Much of the benefit would be deduced from examining the deals made by big business and comparing them with what would have been expected. One hopes it means more investment into jobs and stuff, but I'd expect it to more likely be in shareholders' pockets. Outside the London area one would be even less likely to see change, but even in London, apart from the construction made to hold the Olympics, that is still there, locals aren't going to see much change. In fact on the morning TV today it was stated that local businesses had lost a lot of trade, so they certainly aren't seeing a benefit.