As the Mashable team scampers around the Consumer Electronics Show (CES) in Las Vegas this week, there's one question that's top of mind every time we visit a booth or attend a demo: "That's cool, but when can I buy it?"
A lot of times, the answer is never. Many gadgets exhibited at the annual tech industry trade show are just concepts and prototypes that don't make it to market. (That Withings OMNIA smart mirror for at-home health screenings, for instance? Yeah, there's a good chance it'll...