I don't understand all of this talk about two chains etc. There is no way that is going to happen. The miners won't mine on a shorter chain, they will follow the longest chain period. The whole system is controlled by miners regardless of what devs and investors think of themselves. The only power and the only votes that count are those of the miners.
Miners do not determine price or usage, the market does.
The market is everyone.
I'm sure there will be miners who mine on the shorter chain. And you know what? I'll spend on their chain, because I can. And to annoy everyone else.
I hope we can fuck this whole bitcoin system to the max.
Only if it survives all it is worth something.
For everything else there is paypal and friends.