First, I'm what you might consider a TiVo early adopter. I got my first TiVo in 2000. We took a rather lengthy break from TiVo a few years back, opting instead for a Windows Media Center PC with Xbox 360s for extenders (which has worked quite well). But now Xbox One is coming out (and we will be getting one). And I believe that a TiVo will be a better fit with the Xbox One HDMI passthrough.
So, we're back. I picked up a base Roamio yesterday and got lifetime service on it. If all goes well with Roamio and if the wife likes it, we'll end up with a TiVo mini to extend the experience to another TV.
In a way we missed TiVo, but I think that I'll also miss some things about having a media center PC. I'm looking forward to seeing how Tivo has evolved over the last few years.