Apple touch keyboard

Tactile feedback isn't exactly new to the mobile device arena, but Apple is apparently looking to add a bit of tactility to on-screen keyboards of the future. In a recent patent filing, the gurus in Cupertino have described four arrangements for accomplishing the aforementioned goal, some of which include adding dots / bars to keys and throwing an articulating frame underneath the panel to enable users to feel varying levels of resistance when mashing down. Per usual, we're left to imagine where such technology could eventually end up (tough job, we know), but considering that this is the third touchpad-related filing seen from Apple in the past 20 days, who knows what is (or isn't) brewing.