The wearable beacon option has been discussed in the forums before. 
The specific one you pictured, from radius networks, can be purchased with a wristband and is popular for a big conventions.
There are a couple of issues with it besides the aesthetic ones. The first is that Beacons use Bluetooth and Bluetooth goes through walls. So it’s very hard to define a room the way human beings view them. The Beacon may not see any difference between the kitchen and the dining room next to it, or even the bedroom one floor up.
To get around that, beacon companies like estimote have developed zoning technology, but that requires three or four beacons per room, which gets pretty expensive.
The patent for the device being discussed in this thread is the ability to identify a zone with a single device. I’m not sure how they’re doing it, but it’s pretty cool as a concept.
At my house, as I mentioned before, I do have an IBeacon on my wheelchair and I use it to detect when I enter a 3 m zone around the wheelchair ramp by the front door. It works well for that, but of course having it attached to the wheelchair is convenient since I’m not going anywhere it doesn’t. 