yes I have to both.
Have you actually tried or seen what the P90X is actually?
I see what you are saying, but I wasn't necessarily thinking about achievements. I was more thinking of how the Kinect could track your progress. Even with personal and physical limits taken into consideration, I would think most people would like to see improvement over time. It's a pretty common thing for a person to overestimate how much of something they've actually done. People are pretty bad at mental math/honesty and I could see something like Kinect possibly keeping a player more honest with themselves.
I use the P90X and the system won't work with the Achievements system as P90X is based on your own personal limits: Achievements needs a pre-determined sets of number (i.e. Reach 200 push-ups) which is not what P90X aims for. P90X does not have a general and specific sets of goals (do 50 push up on day one, 100 on day 30, etc), the goals are based on your personal and physical limits.
Either way I think a developer could potentially design their way around such an issue.
doesn't seem nearly as popular on giantbomb,com as Wii Fit. But I admit I haven't tried that one yet as I didn't dig the first one. What do you like about it?
Answer: EA Sports Active 2.0