I remember when I first discovered you could draw in Inkscape using a wacom stylus.
It was about 6 years ago...
Touch may be ubiquitous to people who poke around with their fingers on a tablet for content consumption purposes, but the graphics industry has always been about the stylus. Note how even Apple is finally caving in to the demand for it with iPad "Pro". If you have a stylus you don't need to change much ui-wise to make Inkscape tablet-friendly, it's trying to make everything large enough to poke at with your meaty paw-sausages. Imagine all numerical values coming up touch-icon size. Talk about a drawing space hog. The alternative most apps use is popup dialogues for values, also much slower in a workflow. We COULD have a tablet mode, however. Making a different version of inkscape just for tablet seems a bit much though.
If you don't have a stylus, well, welcome to graphic design hell. There are plenty of tablet apps that
try.to do vector. I haven't seen one yet that was any good at it in comparison to Inkscape. It's not for lack of features, it was hard-core lack of usability without the precision of a stylus, and the benefits of a whole keyboard's worth of hotkeys. :)
My 2p.
Incidentally, Inkscape can not easily be re-written for tablet OSs, and there's enough work to do on Inkscape proper at the moment.
Krita is far more positioned to fill the tablet-based illustration needs of designers than Inkscape is.
These are your hard-core tablet folks (I'm one of them) ;).
-C
