It is very exciting to see so many "killer app" projects upcoming in the near future. They will definitely add great value to bitcoin, and I think the price has to reflect that, so I think the price will go up after these things come out. I rank them by my estimation of their order of importance, and how I believe each one will add value to bitcoin.
✓ 0⟫ Segregated Witness - Larger block space, which will increase the capacity of bitcoin transaction, making room for more people. And empty rooms always tend to fill up, so I expect many new users from this idea. It also fixes malleability issues, and makes 0 confirm double spend harder so we can now build instant transaction systems with greater confidence and less risk of double spend with lightning network technology.
1⟫ LightningNetwork - Increase bitcoin transaction throughput. Instant payments, scaleable payment system.
✓ 2⟫ Bitsquare - First decentralized cryptocurrency exchange, that cannot be censored or controlled, just like bitcoin. We are all tired of exit scams, hacks and inside jobs , or random account suspensions. The decentralized exchanges will bring us a new paradigm, and make trading more liquid and frictionless. This can bring a huge value to bitcoin. I`d put this as NR 1. over long term, but it might need a lot of testing and bugfixing before it can gain traction.
Other upcoming decentralized exchanges are: http://www.coincer.org ,
http://www.supernet.org ,
https://etherex.org ,
https://bcexchange.org✓ 3⟫ OpenBazaar - Decentralized P2P marketplace, a great invention that never existed before, and has the power to reshape global trading. It could work with any currency, so all currencies could gain value, but I think it will bring more value to cryptocurrencies, in majority for bitcoin. Frictionless global trading will also help many poor countries, that may already be looking after bitcoin, but need a "killer app" to start using it frequently. A huge project that will give indirect support to cryptocurrencies.
4⟫ Embedded Mining - 21 Inc plans to create embeddable microchip miners that can be integrated into any appliance (for ex smartphones) and it can create a world full of bitcoin miners in every device. This is huge, it can help decentralize bitcoin and it can help many people on the planet to grab some bitcoins for themselves.
5⟫ RootStock - "Is the first open-source smart contract platform with a 2-way peg to Bitcoin that also rewards the Bitcoin miners via merge-mining, allowing them to actively participate in the Smart Contract revolution. RSK goal is to add value and functionality to the Bitcoin ecosystem by enabling smart-contracts, near instant payments and higher-scalability."
6⟫ Joystream - Decentralized filesharing system. It is really helpful for small producers: singers, musicians, DJ's, and other artists. They can just host their art and get a huge audience, while bitcoiners could get a new money earning platform. The hoster and the seeders share the revenue, while the downloaders pay for it. Therefore many newbies will have an opportunity to earn bitcoin, thus increasing the demand and utility for bitcoin. It's a big direct support for bitcoin.
✓ 7⟫ Brave Browser - They will be the first browser to integrate bitcoin in their software, allowing people to spend and earn bitcoins directly. They have also designed their browser to be privacy friendly so its a good combination for bitcoin users. Although Chrome and Firefox own the market, they could gain a reasonable market share, and also force Chrome and Firefox to integrate bitcoin as well to stay competitive. In any case it will be big, however it will take a longer time than the other events, so i put this on the 7th spot.
✓ 8⟫ BitcoinJ Payment Channels - Payment channels to send and receive microtransactions, good for faucets, tipping or any other smaller transactions, without miner fees. It's not that popular and established yet, but in the future it could be a technology that can make smaller transactions less costly.
✓ 9⟫ BitHappy - It's a bitcoin mobile browser for smartphones. It offers a marketplace where you can buy sell items with bitcoin. It can do micropayments, it connects directly the buyers with sellers, and it has escrow system. It works with Mycellium mobile wallet.
10⟫ Rein - It's an early prototype for a job market for freelancers. It has multisig capability, trade is trustless and pseudonymous. It is modeled after the internet with microhosting servers that compete with eachother.
✓ 11⟫ CredibleFriends - Peer-to-Peer lending mobile app. It is a trust based p2p lending app for mobile phones via Bitcoins. It is the world's first p2p credit card system.
Let me know if I missed something, in my opinion these are the most exciting events or projects we can look forward to in the near future! 
