The specs aren't going to excite gamers, but Polish developer Przemysław Strzelczyk and his team have built a decent working computer into a Mouse.
The Mouse-Box, currently at working prototype stage, packs a 1.4 GHz quad-core ARM CPU, a micro-HDMI port, WiFi up to 802.11n, accelerometer, gyroscope, two USB 3.0 ports and 128 GB flash into the familiar form of a pointing device.
Because nobody will be able to work for long with so little storage, there's also a cloud storage service, and the hardware includes space for an optional battery.
When it's ready for the market, Mouse-Box will ship with a foldaway inductive charger.
The HDMI port is the key: it's imagined users will connect the Mouse-Box to a nearby monitor. When users are at home, the device will nestle on their desks and behave like any other mouse. On the road, the device will hook up to a monitor to provide a familiar environment.
The currently-sparse information available at the Mouse-Box website is supplemented with the video below.
It leads El Reg to wonder what other suitably-small consumer products would be all the better for having a fully-fledged computer inside. Swiss Army Knives are out, naturally, because you can't take them in your hand luggage. Headphones are a possibility, we suppose, but there must be plenty of other ideas out there that our ever-brilliant readers will tell us about … ®