It looks like it could be promising but I will reserve judgement until anyone can actually review a copy of one. So far since they announced it Microsoft has been completely hands-off for journalists except for powered-off models so it looks like they are still working on it and ironing stuff out but felt they had to announce early.
Hopefully it won't turn into Microsoft's own 1Dx or supertele delay fiasco with a never ending gap between announcement and anyone actually seeing it working.
Chris