I'll go on the record with my thinking that Litecoin provides "something to do" with your GPU if you want to keep mining with it. Maybe you're looking to mine as much as possible with GPU *and* ASIC. In any case, there is still a huge market of gamers who never mined Bitcoin but will wonder what they can do with their computers once Bitcoin surpasses its all-time high. There litecoin'll be.
Once the miner/user base grows, I expect upward price movement and increased developer focus. I'm not sure it'll come from Bitcoiners though. I'd imagine it'll just be different.
LTC is faster than BTC and more can be sent. Once we reach the transaction limit for BTC people will be forced to use LTC (or fiat) for things like s.dice.