Clearly yes. In my own case, it's because while I rather like 4e, that wasn't universal in my gaming group so we've been bouncing from one gaming system to another since 4e came out and there's at least a chance 5e might be something we could stop on. But it's also because 4e has some issues that can't be really fixed without a new edition, but I'd rather not just punt and go back to 3.x / Pathfinder forever (even if I've pretty much decided that while I prefer 4e to 3.x, I prefer 3.x to retro-clones and 1e/2e by a large margin).