But my guess is that being the second immediate P2P currency will give traction to LTC and some people who came late to the BTC party will jump in rising the value for a while.
ASIC miners for bitcoin are not viable for litecoin because the litecoin scrypt hashing process is memory dependent, not CPU-bound like bitcoin / SHA256. My information comes not from any technical expertise but from interpreting what I'm told by people who have done more research than me.
Maybe someone could explain better?
ASIC implementations for Bitcoin will be based on SHA256, built with not a lot of internal memory that can be accessed without traveling across another bus. Those implementations will not work with LiteCoin or scrypt, which is memory bound. GPUs have lots of memory.
It's no technical advancement over Bitcoin, I agree, but it is gaining acceptance (the prices have maintained parity with Bitcoin growth) and it seems that your current investment in LiteCoin mining will remain relevant for longer than old Bitcoin hardware, just because ASIC developers working on Bitcoin problem all see LiteCoin as just a weaker Bitcoin clone.
That's not an argument against LiteCoin.