There have been some interesting keyboard input devices coming out which allow for more expression than normal piano keys, using a sort of hack to the MIDI syst

There have been some interesting keyboard input devices coming out which allow for more expression than normal piano keys, using a sort of hack to the MIDI system called MPE - MIDI Polyphonic Expression. For example the Seaboard Rise or the Osmose. Depending on the instrument it's possible to do per-note pitch bends, change pressure while holding notes, perform vibrato etc. Visually the physical movement is not as interesting as electric guitar though, so yours probably still wins.