Audio software specifically designed for small Metro tablets might make for a decent experience but if you try to use DAW software made for (multiple) large desktop screens you're gonna have a bad time.
It only has one USB port so with an audio interface there's nowhere to plug in an external hard drive if you need the space or to offload audio streaming from the system drive (and hooking your AI and HD to a hub ain't going to cut it either).
The new Surface tablets look very interesting. I can think of several things it would be good for. But Pro Audio is not one of them. You have to use the right tool for the job.
I have a desktop computer (6 core CPU, 16GB RAM, 27 inch monitor) for my audio work. Why would I want to use a tablet? That just silly.