Not for want of lack of imagination. Faster, similar form factor, different os etc.
That sounds interesting regardless. I was sort of wetting my appetite for a new phone/tablet/phablet in anticipation for my contract ending in july (and getting carried away) with http://www.concept-phones.comZTE are apparently workin on a 5.9" 1080p Wp8 padphone. That's about all the detail so far
Edit - oh wait I thought you were talking about a phablet.
I don't think many if anyone will copy asus direction.