As with anything else, the prices will start coming down. It might take a while and I doubt Apple will follow the others in doing so (says the iphone user) but they will.
At that point portable game consoles will seriously be struggling. Well, Nintendo will, the PSV has the PSN supporting it.
Did the E3 at least determine if the 3DS will be able to act as a limited Wii U controller as they've been hinting?