Hugh Pickens writes "With Windows 8, Microsoft has made a billion-dollar gamble that personal computing is taking a new direction and that new direction is touch, says David Pogue. It's efficient on a touchscreen tablet. But Microsoft expects us to run Windows 8 on our tens of millions of everyday PCs. Although touch has been incredibly successful on our phones, tablets, airport kiosks and cash machines, Pogue says touch will never take over on PCs. The reason? Gorilla Arms. There are three big differences between tablet screens and a PC's screen: angle, distance and time interval. The problem is 'the tingling ache that [comes] from extending my right arm to manipulate that screen for hours, an affliction that has earned the nickname of gorilla arm.' Some experts say gorilla arm is what killed touch computing during its first wave in the early 1980s but Microsoft is betting that Windows 8 will be so attractive that we won't mind touching our PC screens, at least until the PC concept fades away entirely. 'My belief is that touch screens make sense on mobile computers but not on stationary ones,' concludes Pogue. 'Microsoft is making a gigantic bet that I'm wrong.'"