It's not useful, but it's technically true, the overhead and development is negligible, and it amuses me. "See? It's super sophisticated just like that progress bar in the movies!" Incidentally, it also makes it easier for operators to accept the computer is busy and just wait a minute.
I don't really mind abstracting anything high-level and taking shortcuts -- it's hard enough watching someone navigate a web browser in real life ("Ctrl-L, goshdarnit!"), I certainly wouldn't want to watch them go through the search results in a TV series. Just like every OP scene boils down to one dramatic event, not hours of meticulous work.
I just get riled up when the basic computer operation is totally unrelated to the real world, because by now people kinda know how a computer works, it's not the early '80s anymore. Two people typing on one keyboard, 3D views etc.
One thing I've accepted by now is the useless display of data when searching. Non-matching ugshots flashing on screen and the like. A progress bar just isn't very exciting. (Actually, if it wouldn't slow down the actual operation, more real-life interfaces might benefit from something like this.)
Some of it still makes me cringe, but when you put it into the perspective of their general audience it does seem, to me, that it's more complex than 95% of said audience can understand. Additionally, I haven't noticed many blatantly stupid/irrelevant errors in the shows technospeak. It's all generally, vaguely, sorta legit.
I mean, I am not seeing any gooey interfaces in visual basic yet (ignoring the typical beep-boop flashy computer interfaces).
I think a progress indicator with figures calculated to the billionth pretty well secures joke status.
Love watching the movie while drinking somewhat heavily with friends.