I don't know about this. Hook up a &500 iPad to power and to your TV and pair it with the bt gamepad every time you want to play a console game? As opposed to a <$300 device that's always hooked up to the TV and controllers?
I'd say the Apple TV is a much better contender for this market. But still isn't really technically able to push the blow-out titles that the gp is talking about. Not even close, since both the iPad and ATV are on low power ARM processors, while modern high end consoles are basically full-fledged desktop PCs.