OK, so could someone please put into N00b-speak the difference between a plasma TV that says it's "120Hz/150Hz Refresh Rate" (mine says 150Hz FWIW) and one that is "3D 120Hz"? Is it just some ability ...

Don't see what the point is. Most people can barely tell the difference much past 100-120hz from what I've seen, and I'm getting a bit sick of absurd refresh rates ...