The T&Mouse from Hanwang is certainly unique as this USB-powered device comes with a depression in the middle which houses a tablet surface. I’m not too sure what you can do with such a small surface area though – perhaps zooming in on a photo and doing micro touch ups? In any case, having a gaping space while holding the mouse is going to feel plain weird at the beginning. Serious digital artists ought to stick to their regular sized digital tablets. Pricing and availability details are unknown, but it is most likely released in China first.