We should have multitasking benchmarks......
Like you know loading a bunch of tabs in a browser and trying to effortlessly switch between them and see which device is really good at it? The current crop of benchmarks NEVER take into account that sort of a thing.
Or how about you exit a heavy game, load up another heavy app for like 10 minutes and then see if you can go back to the game immediately.
I bet the iDevices would get destroyed in those tests.