Size was mentioned on the other thread, but this one's got a piccie, and I've closed that tab already :-)

Patent declaration diagrams do not a device make (either in terms of plans, hardware or reflection of reality ;-)). One that size obviously adds weight to the theory that it'd be a Mac tablet; alternatively if it's 2.5x the size of the iPod Touch (one suggestion), that puts it somewhere between a UMPC and a NIT. More likely to be marketed as a more consumer-oriented device for a particular niche (e.g. Internet browsing) rather than a general tablet-format computer.