It's a shame they have called it a 1/10th - it is no where near the size of the existing 1/10th rally RC cars. Sure to be a bit confusing.
I can't see them doing anything at a track other than running alongside the Short Course cars. It's a shame they haven't gone for a proper scale shell with it as well - I suspect the loss of the "Ken Block" brand to HPI has influenced that, I doubt you could sell a Sebastien Loeb Citroen DS3 in the USA.
Having the SC-sized wheels does address the main problem with the Tamiya rally cars - the TC sized wheels won't handle the off-road features of most people's gardens.