This is actually the principle reason I invest in bitcoin - I imagine that (at a very consecrative rate, because it requires a super majority of consensus to bring about a protocol upgrade) it will integrate features from other cryptocurrencies that can be proven valuable. And I don't mean things like scrypt - the status quo of bitcoin like their sha1 hashes. And they don't want proof of stake because they buy expensive mining hardware to get the cash outs from doing work.

But they might (probably, actually) inflate the money base a lot further down the line, and never let it actually cap at the 21 million btc Satoshi advertised.