Yeah, piano playing was a bad example. There’s a reason MIDI keyboard manufacturers try so hard to replicate the weighted feel of a real piano. Your fingers need feedback.
An interesting aside here, there is no one, true style of action for keyboard instruments and no one, true type of feedback.
I have a good 88-note hammer action stage piano. I love it for acoustic pianos and it's OK for electric pianos (Rhodes, Wurlitzer) but it sucks a bit for organ, clavinet and synths.
I've seen people play Hammond really, really well on a weighted keybeds but it's much easier to just plug a second cheap(er) synth action controller in for organ parts.
I've never met anyone that really liked playing a tablet screen though. :P
