I'm currently running it on a 7-inch touchscreen at home. It mostly works great. I do see some font clipping issues in JRemote, but my guess is that those would be worse on a 10" tablet than a 7" inch (they get worse when increasing the font scale).
It's currently very well optimized for phones, and looks great on my Galaxy Note, which is, in terms of size, more or less a 6" tablet. Glad to hear some tablet love is coming.