Well, I'm under the impression that just because you CAN do something doesn't mean that you SHOULD do it, especially if you can't pull it off right. Some things, like rotating monitors, have been perfected and I think are at a point where they look good and easy to implement. Other things, like light-up t-molding, have fallen by the wayside because it just doesn't work the way it's envisioned.
Then again, I'm a traditionalist. I'd take a boxy, well-painted, well-executed two-player black cab any day of the week (mainly because that's what I would have seen in an arcade back in the day). But that's me. There are some really nice out-of-the-box projects here, and others I just silently shake my head at. In the end, if the builder's happy, that's all that should matter.