1) mining at higher power draws or with >1w/GH equipment will immediately be profitable to run for most people, even if electricity is ~$0.28/kwh or more
2) miner prices are cheaper because what now costs 1BTC ($375) to build and ship will only be 0.5BTC or less
granted - I expect that almost all but hobby mining will be centralized very soon, wherever electricity is cheap or cool air is abundant. That's just a natural outcome as Bitcoin becomes a competitive technology and companies like Bitfury intend to operate over 100MW of equipment