Doesn't sound right but it is nintendo so I wouldn't be surprised if there is a curve ball in there like the game 'discs' having their own memory for saves etc like they were working on for the SNESCD addon, but 8GB of local storage definitely doesn't sound right to me. Even a few wiiware titles would quickly use that up. But at the same time It wouldn't be like nintendo to use a conventional HDD for local storage.
The proprietary disc system sounds about right though given nintendo's love of proprietary storage (the wii is the only nintendo system to not use such a system)
Well yeah I still reckon it's fake and more an elaborate hoax by some design students mostly because of the lack of an Ethernet port (even if there isn't one on a retail unit surely a dev kit would have one) but also I think the omission of an optical drive (a full size one anyway) would be disastrous.
No backwards compatibility and no blu rays or even dvds? just sounds a bit too much for me, though there is a rumour that the games will be sold on 25GB flash cartridges (or memory cards depending on your semantics). Either way we'll find out soon enough, roll on the E3.