In the past, we've made no secret about the fact that we prefer using Windows 8 with some sort of touch input device, but it's still nice to see Lenovo adding an extra option for folks who prefer keyboard shortcuts.

ENGADGET: Lenovo ThinkPad Twist review: an old form factor gets new life with Windows 8

While there are several peripherals that add keyboards and joysticks to smartphones, Sensus goes one step further by adding touch input to a device's entire outer surface.

ENGADGET: Canopy's Sensus gaming case protects your iPhone 4 / 4S, adds plenty of new touch sensors (update)

Plus, Tegra 4 with Direct Touch technology gives it touch responsiveness that is a more consistent, accurate and smooth-flowing touch input experience than a standard touch device.

ENGADGET: NVIDIA unveils Project Shield, a Tegra 4-powered Android gaming handheld

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.

ENGADGET: Hands-on with wireless, ultrasonic stylus and touchless gestures at MWC (video)

With the delay between touch input and screen response slashed by orders of magnitude, a device that sports the sort of super-low-latency Dietz envisions has the potential to feel far more (for lack of a better term) natural than its brethren.

FORBES: Microsoft Demos Super Fast Touchscreen Display