Hollywood has gotten better about faking technology. At least some people in Hollywood have. "Silicon Valley" on HBO went as far as having a Stanford CS professor develop a viable compression-rating system to be used on the show (the "Weissman Score," named for Professor Tsachy Weissman).
I've been really impressed by the TV show Halt And Catch Fire in this regard, the sales guy is slightly incorrect as a sales guy would be, but the engineers are bang-on.
The first two seasons of Alias were pretty ok regarding the use of computers. Granted, they still did impossible (highly advanced) stuff with them but it looked plausible. But after season 2 they jumped the shark in all regards.
