[jbd0]

The blog post says they'll be using Application Templates to implement this:

https://docs.blender.org/manual/en/latest/advanced/app_templ...

So touchscreen support will be like a mode you can switch on. I don't think desktop users will be affected.

[shortrounddev2]

Until they find it too tiresome to support two different interfaces and deprecate one or the other

[diggan]

Removing/degrading the UX for keyboard and mouse users would be (professional) suicide for Blender, I'm 99% confident Ton would never do something like that, unless most of the user base suddenly find themselves using tablets exclusively. And even then I'd doubt he'd leave us desktop users behind.