One thing I think is sort of annoying. Now, correct me if I'm wrong, but do they ever give a pseudo-sci explanation for the Holodeck? I'm a pretty big trekkie (with a slipping memory) and I don't ever recall them doing anything more than explaining it away as what it is, now how it works.
So, I ask, what is to say that it uses projectors, holograms and the like to make tactile-interactive scenarios and projections? One other idea is the concept of manipulating brain waves. One of the things we know ABOUT, but haven't done a lot of work into are the natural brain waves we have (Gamma waves, beta waves, and so on). What's to say that the holodeck hasn't harnessed some currently-undiscovered way to subtly control the electrical impulses in certain areas of our brain (motor cortex, occipital lobe, etc) to make it FEEL like we're in a "holographic" experience, when, in reality, we're merely standing still. The gridded room could serve as a matrix for the computer program to map read your brainwaves from and remap them with texture, similar to a wireframe.
IMO, that'd be WAY cooler tech to be investing in, and I'd LOVE to see something like that at a Siggraph.