Recent remakes on broadcast TV:
1) MacGyver (CBS)
2) Hawaii Five-0 (CBS)
3) Magnum P.I. (CBS)
4) Murphy Brown (CBS)
5) Will & Grace (NBC)
6) The Connors/Roseanne (ABC)
Why this is happening: Broadcast networks need to appeal to a broader audience and these reboots have an audience who historically tuned in.
Older audiences are making up a higher share of viewership.
More #1: What the grown-ups think about TV