> What does acme do to help on touch screens?

Unlike emacs or vim, acme leverages the mouse/gui for powerful editing - and I believe (multi)touch screens have the potential to be better guis than than screen+mouse. For one thing mice generally utilise at most three fingers and one hand - and IMNHO while eg blender/photoshop combine mouse and keyboard - the combination is awkward and not very intuitive.

I think (but am far from certain) that acme is a more promising approach.