I think they will want the Wii 2 to be as unobtrusive as the Wii is. The concept and expense of using a HD drive running at super speeds goes against their design principles, but so do excessive load times. Noise/Heat/Size are things which are completely contrary to the design of the Wii as it currently is. They are a consumer focused company and therefore they will not make such design compromises.
Im picking they will delay their release to 2011-2, rather than trying to push technology too far. Im picking they will release a system with a drive for legacy software, but future releases will come on an ultra quick cartridge. Think ultra simple, pretty quick and cheap to make and they will include a couple of GB of flash for on board storage.
The processor architecture im picking will be >20W, single unified CPU/GPU with 4*2Gb ram chips yielding 1GB of total system ram. Essentially im picking it to be something like AMDs fusion processor, but designed to work within a Laptops constraints.
Tease.
