There are already alts with more Security, fast transations and fair distribuition, etc.
None of that is groundbreaking enough to challenge bitcoin. Not by far, not for years.
Not?
bitcoin is popular, and traded in China, hence huge value, and value does not mean that the coin is better than the other .......
NXT has decentralized exchange.
NEM will have PoI.
Qora promises a lot of things.
There are others like ethereum mastercoin and I do not understand well.
All prove that the PoW bitcoin is outdated, wastes energy, makes centralization (private, which is worse than the public), meritocracy is not always fair.
This world still give many turns.