A lot of companies -- including heavyweights like Microsoft -- believe that motion control is the future of the human-machine interface. But it's an awful lot of work to wave your hands around every time you want to change windows, isn't it? Swedish firm Tobii, which specializes in eye control, teamed up with Lenovo to craft a run of 20 prototype Windows 7 laptops with eye control sensors built-in, and we had a chance to check out the setup here at CeBIT today.