The one-hand-on-the-keyboard-one-hand-on-the-mouse mantra falls down for tablet and portable (touch/stylus) device users. An alternative gesture or pointing device only input system would be extremely helpful.

Blender is hard to use on devices which have minimal physical keyboards. When using a tablet, functions such as scrolling (to increase the size of a fall-off area for example) require using the mouse's scroll button - or at least taking a hand off the pen or keyboard to use the on-tablet scrolling.

Blender currently offers multiple ways to work: with fixed menus, under-mouse menus, buttons and keyboard combinations, blender can be operated almost entirely using a tablet (or stylus), except for a few core functions (especially those requiring modifier keys, eg viewport navigation).