Don't forget the Nintendo Network!
- User accounts: Wii U will have individual user accounts, rather than one system-wide account.
- NFC: Near Field Communication ("touch" data transmission from accessories, credit cards, etc... sort of like QR/Streetpass combined) will be built-in.
- Online: Miyamoto: "Network has to have a totally new concept to be different."
- Third parties: Several new, previously unconsidered alliances/partnerships with third parties.
- Communities: You haven't seen the last of them!
- Retail title downloads: 3DS and Wii U both support digital download of retail titles, but... they still aren't quite sure how to implement it just yet.
- Item billing: "We should not decline third parties if they want to offer item billing" (paying to unlock content).
- DLC: Still planning to offer DLC (possibly talking about their own software), but needs more time to complete its feasibility study on the market and its needs.
- More sharing: "Digital will include user to user communications, competition and sharing"
- Better-paced software + DLC: Nintendo has learnt that it shouldn't have stagnant periods between software launches: can fill the gap, and DLC can extend the life of a title.
Regarding the Wii U's power, take this with a grain of salt but a former Fench Journalist on GAF with second-hand info said the graphics fidelity on screen when the console is processing images on both the main screen and controller screen is 2x Xbox 360. He says this was mid development and that alot of graphical effects are added at the end of development so it can look better.
He also says some of the hardware components of the console are 4x- 5x 360 and that the system will have more than 1GB of RAM.