GPU miners are going in altcoins where not even FPGAs really exist yet (unless BlockBurner has something to say about that ), let alone ASIC devices. Bitcoin is going pro, only those with more daring and deeper pockets can mine effectively, leaving coins like Litecoin fertile ground for all manor of lower end investors that missed the Bitcoin wave. ASIC will push GPUs out of Bitcoin, but not the rest by far. GPU mining will be fine until FPGA or ASIC is simply the starting standard for new coins.
I completely disagree - alt coins (most especially scrypt based) are a long-term dead end. The entire idea is flawed... it amounts to trusting obscurity to secure your network while at the same time using growth of the network as a metric to determine value.
The only reason that ltc hasn't been destroyed is because nobody with the skills or the time has the inclination to design a device for it. That will happen if the alt-coin ever gets to be worth enough. It would take someone with fpga experience all of 2 weeks to design an fpga based ltc miner (especially if they've done btc fpga development in the past). I'm sure there are some other older geeks who're capable of making their own boards who've been considering ripping apart some of our fpga units and making something for ltc.
The only reason I haven't is because I haven't got much free time, and don't really need another project on my bench.