I'm still going with the 2-3x wii u performance upgrade but you have to factor in the wii u performance was at a very low level. It will not be competitive with ps4 or xbone in either gpu or cpu performance. As crap as the x86 processors in the ps4/xbone are they still will comfortably outperform the arm's of the Switch I expect. It's all a grey area though as we don't know the final spec of Switch but I'm confident Nintendo will compromise it slightly to reach a certain manufacturing cost. I still think gflops performance of around 400 gflops, only 4 cpu's and slower older ddr3 memory or single channel ddr4. If it's shared memory I expect there will be something in the main SOC to provide enough space for the frame buffer plus a bit more, perhaps 32 or 64MB of fast memory, cache etc. This memory may well replace some of the cpu or gpu units.
Clearly Zelda is looking very similar across both consoles so I doubt there is night and day performance differences.
I am expecting cartridges to be smaller than people are expecting so I think there will be some issues there.
It's not going to get decent versions of major third party games. Even if it sells huge numbers its technically much weaker and they don't sell too well on Nintendo platforms. It will be the same situation as wii. Cartridges ensure it will be expensive for third party developers and history shows us such games sell badly so its a non-starter.
