Let's say the merger rumors are true, and worst case happens. TiVo alternatives?

Lots of "ifs" and conjecture here, but hey, it's the internet so let's lean into the the FUD for a few minutes.

If TiVo merges with or is absorbed by Rovi and then discontinues its retail business leaving us all in the lurch...what are the alternatives to TiVo that are currently on the market and how do they measure up to TiVo and cableco offerings?