We're not convinced that combo mouse phones are the way of the future but, hey, if there's a market for laptop trackballs then anything's possible. In fact, the competition is apparently heating up sufficiently so that manufacturers are vying to cram even more functions into the devices--the latest being an earphone.
Why? For "extra privacy," as Geek Alerts notes, though there's no microphone boom to whisper into. But we suppose one can't be too picky about a Skype phone combined with an 800 DPI optical mouse that goes for $22.