Why would anybody reboot The Wire or Firefly when they were done so well the first time? Those projects would be doomed to fail. I'd really like a spin-off of Firefly, you could get away with only having Nathan Fillion back as Mal, and his ship. Could Kickstarter fund a TV show?
After my experience with BSG I couldn't see reboots as a good thing, all the others were mediocre at best (V, Bionic Woman etc... etc...), but Upstairs, Downstairs is really good (I started watching because I'm a fan of Claire Foy and Keeley Hawes).
With all the vampire shows around it might not be the time but Kindred: The Embraced could have a reboot, they did a lot of things right and it was only cancelled because the lead actor was involved in an accident from what I read. A lot of the flaws were due to the trends in television of the time (1996), so those could be replaced by the flaws that are in the trends of today.
Max Headroom could be rebooted, television needs more dystopian cyberpunk, although after Dark Angel and Dollhouse it would probably be a hard sell to get it made.