not everybody does cpu intensive things. would you really want to spend 300-400 more dollars to get a processor that you'll never take advantage of? just so you can say you have a sandy bridge processor?
Who said there is going to be a price increase? Refurbs might end up being that much cheaper but I would say they are a moot point because not all countries even have them.
We don't know what the next refresh will include but most likely it will be more than just SB. If nothing else, then at least Thunderbolt. The lack of knowledge is what usually makes people wait. You don't want to buy something today and then notice a few weeks after that the MBA got so much nice new things.