Remote controllable power outlets have existed for a very long time. At this point, you have dozens of options, and several home automation industry standards that allow all these options to interconnect with each other. You can combine plugs, light switches, motion sensors, keypads, door openers, thermostats and virtually everything else in your house with any brand's Zigbee or Z-wave hub, or directly from a PC/app over wifi.
Z-wave/Zigbee are already low-power mesh networks. I don't think there's any advantage to re-implementing that over Bluetooth with a different protocol, while the disadvantages if you ever want to do more cool home automation stuff than just power plugs are many.
If for some reason this all sounds scary and you'd prefer just plugging something into the wall and using an app, that's been on the market for years too. The easiest way to get started is to walk into your nearest Best Buy or Home Depot and pick up a Belkin Wemo switch. It plugs into any outlet just like this Kickstarter but connects to your wifi network instead of BT. There's an Android app to control the plugs (from inside the house or over the internet), but they also speak UPnP so are easy to integrate into your own software.