I suspect that mobile in general will move towards services instead of applications. There's a lot of data crunching that you can do when you have a data collection device in every person's pockets, but doing that crunching on the client will drain your batteries it to time. I predict that the really interesting mobile apps will have a thin (but native) client that only does data collection & UI, and then the most computationally interesting piece will be hosted in the cloud somewhere.