And while I can't speak for sales, I will say that 4e is likely to bring in new players where Pathfinder seems unlikely to do the same. As a matter of fact, I haven't purchased a 3.x game product in around 2 years or so, maybe longer. I haven't actively played a d20 game since Fall 2006. When I saw the previews for 4e following Gencon I started rounding out my dungeon tiles collection and have since preordered every 4e product be released through August. I've now run a few rough 4e demos with the quickstart rules, characters, and monsters we've gleaned from 4e. I have people showing up to game with pregenerated characters that cannot level and nobody is complaining. From what I've seen with my gaming group and a few others around town, my situation isn't exactly unique. Take from that what you will.