Are you trying to say vita is to ps3 as WiiU is to ps4???
I think he is trying to say, that the Vita will output better graphics than the HD twins in a couple of years, although on paper it is less powerful. The reason for this statement could be the lower res Vita screen.
In comparism to WiiU he says, that the Vita will have similar graphics as the WiiU.
Isn't the RAM the bottleneck of PS360? I think only double amount of RAM and the same CPU and GPU as the current gen consoles should already improve the performance and as far as I know out of these threads the WiiU should have 1 - 1,5 GB of RAM, which should be pretty fast (didn't Nintendo always go for very fast RAM?). Furthermore a more modern GPU and CPU, so I have no bit doubt that the WiiU will outclass the current gen consoles. Not by a full generational leap (10x the power) but it should be significant if the developers of WiiU games and versions fpr multiplat titles put some effort in it.