In short, only if you plan to use game center. I updated to 4.1 tonight to get my SHSH cached (since I've had it for every other firmware) and I was totally unsatisfied. 4.1 really adds nothing of value except the game center (which I will probably never use). I advise that everyone hold off on 4.1 and wait for 4.2 where the real tweaks and goodness comes along (printing, settings enhancements, exe). Just hold off unless you want game center. Anything I missed? Any other enhancements other than "better battery life" as reported by the iPhone Wiki? Thoughts?