Like simple and unsophisticated tests? Here's one sure to generate some heated discussion. MOTO, a group of super brains that assists companies from startups to Microsoft in their product development, has devised a dead-simple test to measure the accuracy of touchscreen devices. The test involves slowly drawing a few diagonal lines across the display using any drawing program on your device. Straight lines are good -- stair-stepping is bad. Now, assuming the app isn't doing some kind of smoothing algorithm then what you see above is symbolic of the accuracy of the iPhone, Droid Eris, Droid, and Nexus One (moving left to right). We met with Morgan Venable, Senior Project Lead / Electical Engineer at MOTO, and saw this test performed live here at CES. Compelling stuff. Video after the break.

Update: Test under medium pressure after the break.