It works through TVs or set-top boxes that are internet enabled, sending out Wi-Fi signals to any device in the home that can also connect to the internet.
The successful trial, involving two foot high Daleks, was revealed by BBC research and development bosses in the industry journal Broadcast.
Project director Adrian Woolard said: "It's a playful illustration that shows the possibilities that exist to producers when we start to think about future connectivity in a home environment in which all devices will be IP (internet) connected.
"Effectively this puts another actor in the living room, enabling a production team to write a script and include it as part of the viewer's experience."
You can watch a video of the toy at DVICE.
Link -via DVICE | Image: BBC
The point, however, is that this is a time travel series. From the Doctor's personal timeline he first met them long after their genesis, but later was in at their creation. So even if the Daleks were completely wiped out and assuming that they could not somehow come back, the Doctor could still encounter them elsewhere on their timeline.
BTW the multicoloured Daleks go way back, although not in the current bright primaries.
The multicolor Daleks...meh. They need glitter.
I have to admit to hoping they're no longer multicoloured. A Rainbow of Daleks is not OK - although I guess you could get one that wouldn't clash with the furniture.