Yeah, I'll just chime in with the same basic thought. I have no reason to stop playing 4e now, what would I run? There's no 5e out there to even try out at this point. It could be 3 years before there is for all I know, and I might not even like it when it comes out (not too likely really, but still).
I think most of us play D&D to play and have fun, not because we really care much about which game we're playing and if it is the latest and greatest or whatever. Honestly I would be just as happy if WotC would have stuck to making more material that I can use vs thrashing core rules, but that isn't under my control, so I'll just grab what does become available and keep using it to have fun.
I'm super psyched about this next adventure I just put together for my Tuesday night group. It is going to kick! I fully expect we'll run through that campaign right up to high level. It will only take around 18 months, maybe less. 5e won't even be out yet by then.