It sounds great in theory... but in practice it will be horrible.
When the community drives a coin fully, it has no direction. There has to be a leader.
Building consensus is one thing, but letting a community lead without having a direction is another.
For my money... we have all the technology we need now. The coin that wins the race will be about planning and marketing. Like BTC, you should be able to any of the "crap" coins out there and make them a winner simply by doing the work required to make them appeal to the masses.
BTC has a lot going for it, and a lot of drawbacks as well. That is also true of any of the alt-coins present or in the near future.