It could also be far more revolutionary. They make it sound like they invented a small-scale holodeck. If that is the case, no matter how it works, or how limited it is, the potential is huge. Realistic holograms would be a major step forwards in connecting computers to humans.
i think the major issue is going to be power. the battery requirements for processing a small-scale holodeck will be huge. making something portable that lasts for a sufficient time is going to require an energy breakthrough