R/C Railroads

Remote Control of trains with onboard batteries already exist in the largest scales, as they are popular with garden railroaders wishing to follow their G-scale locomotives around the yard, and eliminate some of the hassle of running a few hundred feet of electrified track through the often wet outdoors environment.

But what about the smaller scales? What is stopping us from skipping DCC altogether?

I've never been a fan of DCC. It's expensive, finicky, and complicated (IMHO).

Technology has progressed far beyond DCC anyway; batteries for cell phones and small electronics now have the power to fit inside our small locomotives in any scale. And as far as receivers, have you ever seen those tiny helicopters you can buy for about $20 online?

Considering that a locomotive only needs a direction and a speed (two functions), I don't see why there can't be RC receivers small enough for even an N scale locomotive.

Proof of Concept. It worked anyway.