People don't seem to have a problem touching the screen on their phone why is touching a laptop screen any different? I suggest you try out a touchscreen laptop for an extended period if you haven't already.
Phone screens are different. Because Steve told us to touch them. Praise Him; RIP.
Steve also told us no one wanted 5-inch(!) "Hummer" phones. To test our faith, he also said 7-inch tablets were too small and would require users to file down their fingers to use them.