Sony is showing off a concept design for an ultrabook which can be used as a notebook or a tablet. The touchscreen display covers the keyboard when you want to use the device as a tablet. But you can slide out the keyboard and prop up the display for use in tablet mode.
Like the Eee PC Slider, Sony’s concept design has speakers placed behind the keyboard — which means that the screen would actually cover the speakers and probably muffle the audio when you’re using the computer in tablet mode.
Other than that, it looks like a pretty slick machine with a few USB ports and support for stylus input. There’s no word on price, processor, or other details — and this tablet may not ever actually be released.