Here’s a collection of some of my favorite Star Trek holodeck scenes. These decades’ old video clips will give you an idea of what we should try to aim for.
An introduction to holodeck technology in the first episode of Star Trek: The Next Generation:
Interactive holodeck characters that appear and behave similar to humans:
Use of the holodeck for multi-player sports games:
Issues of sentience where a holographic character believes that he is alive:
I believe we’re not too far from realising a true holodeck before the end of the 21st century.