Hard-light seems feasible! Here's a rundown of tech that paves the way. <a href="http://www.theweek.co.uk/68187/first-touchable-hol" rel="nofollow">http://www.theweek.co.uk/68187/first-touchable-hol</a>... <a href="https://en.wikipedia.org/wiki/Directional_sound" rel="nofollow">https://en.wikipedia.org/wiki/Directional_sound</a> <a href="http://www.ibtimes.co.uk/touchable-3d-holograms-da" rel="nofollow">http://www.ibtimes.co.uk/touchable-3d-holograms-da</a>... Basically, a combination of directed ultrasound and laser-induced plasma can create open-air 3D holograms that people can safely touch. We don't yet have the engineering to produce actual force fields that can push things around, but using something like an EMdrive whose output can be directed, you might be able to create that effect. In our comic-book universe, of course, super-inventors have already solved these challenges, but production costs and the difficulty of maintaining the devices, as well as safety considerations, limit them to key government installations, high-tech labs, prototype weapon systems, and the like.