Phone screens that vary their texture or have a typing feel

lasertweezers are little areas of light with similarities to standing waves that are strong enough to move around microorganisms. It is possible that strong laser tweezers could possibly effect the human sense of touch, giving tactile feedback from flat glass screens.

It is also possible that another phenomena, capable of moving 2/10 mm polymer beads called laser tractor beams could also be effective at causing smooth glass screens to have varied feel and touch effects.

Metalensing is recently described technology where a velvet like group of near vertical eentsy waveguides gives the ability to do nonrefractive lensing. Metalensing could produce the laser tractor beams at the phone surface.