EPOS or XTR, but it's been quite some time since we've checked in with either of the outfits. So, imagine our surprise as we stumbled on new developments from each company as we perused the Texas Instruments booth at MWC. In the case of EPOS, we're shown a stylus that, in addition to offering traditional physical touch input, also allows users to interact with a device via ultrasound. The system is built upon TI's OMAP4 platform and requires that four microphones be placed at the corners of the screen. In this demonstration, we're shown how users can manipulate objects on a 3D plane via the Z-axis by pulling the pen away from the display. Next, we're shown a new application for the touchless gesturing system that XTR first debuted back in 2010. In this scenario, it's demonstrated how tablet owners could use the front-facing camera (at merely QVGA resolution) to flip through pages of a cookbook without worry of getting ingredients on the device. The concept software was developed by a French outfit known as Stonetrip, and also allows users to zoom and pan through the pages. You'll find demonstrations of each technology in a video after the break.