Where are the spenders?
Where are the merchants?
Where are the stores and vendors who accept Bitcoin (or any cryptocurrency?)

I still think a big factor here is the tax treatment, at least here in the US. Spending any BTC triggers cap gains. I think that affects the entire btc-as-payment ecosystem.

As for the rest, I don't worry about it too much. We're playing a long game. The blockchain isn't going anywhere and as we continue building it will be ready when people realize they need it.