In my experience, the issue with tablets running GNU/Linux is not so much hardware driver support, but that the usual desktop just does not support touch input

In my experience, the issue with tablets running GNU/Linux is not so much hardware driver support, but that the usual desktop just does not support touch input very well. For example, last time I tried, Debian does not build Firefox in such a way that you could use it with a touch screen for scrolling, opening links in new tabs, and so on. Similarly, evince did not properly support navigation in PDF documents. But libinput debugging showed that the software stack was producing touch data that looked quite detailed.