I would imagine the highest-end wintabs are getting close. I couldn't imagine doing anything on my atom tab- maybe midi, but w/ only 16 gigs of memory ... I would think the best solution today would be something like the SONY tabletop touch - a 20+ inch touch screen and portable, not laptop processor
But even today a cleaner app could do yeoman work, esp. w/ midi. But it shouldn't be too long until tabs replace laptops, and people run their DAWs on those. It will be sooner than you think.
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