That would be fine if Nintendo lived in a vacuum, but there are other factors, such as third parties who aren't pleased at all with the Wii.
The paranoia over WiiU's specs* and online functionality is hope that Nintendo will try to take into account that these are what people ultimately turned to in the end.
EDIT: Just remembered as well, but lacklustre 3rd party support was apparently in part due to Nintendo games stealing the thunder in sells as wells? If I recall? Not sure if that'll be the case with WiiU again.
*AC3, ME3 and Arkham City are all great stuff in terms of recent additions. It's 3-4 years down the line that hopefully there won't be another Wii scenario.