So phones vibrate - so do game console controllers - but what if they provided a "remote touch" mechanism? how hard could this be?
one end simply senses a few "pressure points" - the other end turns this into
the opposite force - a first cut at such a system would be a phone that you could "squeeze" and the phone at the other end of a call just expands a bit - so if someone has the phone in their hand, it "feels" like the remote person is squeezing their hand.
A more complex system would put the phone in a glove and have full on remote robot glove controller sensor and motors (actually you just need motors - in reverse, they work as sensors so it is really really simple to build) - there's a little bit of concern about feedback and the amount of force so the system would need to be sloppy
but that isnt too hard to design.
I wonder if there's anything out there one could adapt to this right away?