Thomas Brand geeks out about trackpads much in the same way I did the other day:
This weekend I had the opportunity to try out the new Force Touch trackpad on the new 13-inch MacBook Pro with Retina display. The sensation of a physical click is so good I had to turn the computer off, disabling the haptic engine, just to make sure I was using the new trackpad. With the MacBook Pro turned off the trackpad doesn’t move. (Clicking on it gives you the same sensation as pressing on the palmrest.) But after turning the MacBook back on, clicking the trackpad gives you the same sensation as the old trackpad where the surface is depressed. Dr. Drang calls this sensation tactile illusion, and it is caused by electromagnets in the haptic engine rapidly shaking the trackpad in a lateral motion. I call it another reason to buy a Mac.
At this point, if you want to confuse yourself, go to an Apple Store and try this out on the 13″ MacBook Pro with Retina Display. It’ll be the geekiest and best few minutes you wasted today.