Phil did a "Farewell?" (the question mark his) tour a year or so ago (which I saw, not a bad show at all), but I'm not sure Genesis as a band ever did.
Without Gabriel and Hackett involved, I'll probably skip, as I'm mostly a fan of the earlier era stuff anyway. When I want an early-Genesis fix, I just go see The Musical Box (
http://www.themusicalbox.net/), which is probably the most incredible tribute band ever, for any band. I've seen their "Foxtrot", "Selling England by the Pound" and "Lamb Lies Down..." shows and they are amazing. You really feel like you're back an an early 70s Genesis show, and they sound better than the original guys ever did on most of the bootleg shows I have! (Plus their singer and drummer even LOOK like Peter and Phil, which is amazingly freaky as well.)