If you do make an ASIC for scrypt, you should be killed.
Why...?
+1
Economics 101 guys.
+1 ASIC uses much less energy and are relatively easy to use and set up. Better for the environment and more accessible to novices.
More accessible in the technical sense, not more accessible from a financial sense. If a LTC ASIC costs as much as a BTC ASIC (it has every reason to cost MORE considering the added hardware needed to deal with Scrypt), then there is no way an average joe will plonk down that cash. LTC still has a long way to go in terms of price and usability for people to start investing in ASICs.
This. The energy problems will go away only if ASIC becomes cheap as current gpu offerings and everyone jump onto the train.. but we all know that ain't gonna happen soon.