I don't know if I'm too optimistic or not but I really have high hopes for bitcoin in the future like.
1). High Price
2). Will be widely known and used
3). Almost all merchants accepts it
4). The seed that we planted will bear a fruit (The bitcoin that we kept for investment )
And lastly,
5). The future bitcoin related products and services
You are right, we're still waiting for that to be happen in the future maybe in 5-10 years later I think.
Bitcoin has been made as digital currency to be an acceptable payment to collaborate with anothers currencies in every country.
Although, now there are some countries more advanced and more extensive used of bitcoin like in China, US, Brazil and Europe where government had been released regulations about bitcoin which increase bitcoin user and price, still there are some zones which bitcoin not developed well enough.
When bitcoin spread widely in those regions, it would be the great time in development of bitcoin. I mean, every one know and use bitcoin as trusted currency at mostly payment like US dollar now.