Those are not "regular expressions." Regular expressions (aka: "regex'," "regexps") are a kind of text pattern-matching "language." The more advanced regex machines (extended regexps, pcre, etc.) are exceedingly powerful.
I wish the Channels DVR support regexps. It would make certain things much easier to do. For example, your two entries could be expressed as:
Name == Indie Horror Movies|TCMHD HORROR
Categories == Movie
Channel == 832|784
Genres == Horror
That's a silly example, because there'd be little reason to do that.
Here's the Wifipedia entry on regexps: Regular expression
Nontheless: I agree with you: Despite the lack of regular expression support, the Channels DVR Passes facility is very nice.