Just the capacitive screen and the touch physics make for a completely different (and better) experience to the actual TomTom units. I get such a shock whenever I use Eryl's TomTom, the interface, just due to those two things, it painful compared to TomTom on the phone.

The only reason I've ever used the demo view was with old TomTom devices that couldn't get a GPS signal when you were inside, for demoing to other people who hadn't seen a GPS navigator before. Not much call for it nowadays...