Going old school with that heh. The old ADB keyboards. Given how wireless technology works, I don't think you can turn on a computer from a wireless device when its off, i.e., there's no power to interact with the computer when its completely powered down. I believe they did away with the powerswitch on the keyboard because USB didn't support such a mechanism as the ADB interface.
I didn't really think about that, but they at least could put the power button on the keyboard and still leave the one on the back.