I find it hard to believe this prediction when your prediction about the handhelds went so hay-wire, but I'll give it a go...
The PS4 and NextBox, despite what people may think about the prices, will ultimately be too high for the market at this time. I doubt that they will have any record breaking sales and pre-orders in their first few weeks/months on the market. The PS4 might have a good line up of games but that won't mean automatic success at all. The NextBox will most likely struggle with the European markets outside of the UK and it won't get much support there at the start. Their first few years will be okay, but...
The Wii U will be picking up after E3. Come the Holiday Season it should have an okay line up of games and Nintendo will release their block busters. If they pull a 3DS (New 3D Mario and Mario Kart) then you bet the PS4 and NextBox will have an even tougher time.
I'm not going to make a end of Gen prediction, though, because that would be stupid. I don't have a crystal ball like Pachter. Most of this isn't set in stone.