As fast as computer tech grows, along with interfaces and 3D developement....anything's possible, although probably not as sophisticated as TNG/DS9/VOY holodecks, primitive...I could see something happening within our lifetimes....hell, most of the tech we have today people decades ago probably would've said "I can't see us having TV's as thin as paper, cell phones smaller than my hand, micro processors with 45nm chips and gaming being in ultra-realistic 3D within our lifetime" right?
most of that stuff was and has been innovated because of the very basis for this site, Star Trek.
And with the new innovation of Supermaps, putting real-time, radar, UAV, 3D mapping/geoscopic imaging and network integration with live video feeds, field communication for what gives the army a real life equivalent of Command and Conquer too...damn. lol