Researchers at MIT develop a shape-shifting table surface [video]
deadstate.org
deadstate.org
edit: finally watched the video. impressively well developed, and a lot faster than I've seen before. So yeah, with a lot better resolution, it could be a thing. I'm not finding much in the way of actual details of how it works ("linkages" = ?), but it seems like it could scale kinda decently. I still think macro-actuators to micro-display is not the way to go in this, though it's probably a lot easier to play with.
Technology this nascent probably aren't the best subjects of this type of argument. I think we should wait and see what this can become.
This type of interaction will be so natural and "obvious", that future generations will look at us as and shudder to think how we managed.
We never cease to amaze.