You are correct in that the thrust is very small. However, it is more than is generated by a solar sail based off any current known sail materials.
They still don't know if the effect is entangled with the earth's magnetic field in some fashion and yes there is a plan to put one up in space and turn it on to finally answer that question.
Both the USA and Chinese military space programs are doing this as we speak.
http://www.sciencealert.com/the-impossible-em-drive-is-about-to-be-tested-in-... 
...... and if it works as planned, you will see a new generation of planetary probes go out, collect hard data and then come back with the data, all in about six-eight months time.
Eventually, they will see something we want ....
First asteroid mining robot ships will then go out, bump up against a likely rock, test accelerate it to accurately judge the density and balance point of the thing, then push it on back towards home very slowly (at first, anyway).
They estimate that a car sized chunk of space debris made up of heavy core elements would be ..... well worth the effort
with profit to spare for everybody involved.
Robotics needed to do this already exist, invented for the self driving cars.
Pick a part of the desert you are not EVER planning on using, and crash land your golden monkey as an aimed meteor.
Practice this a lot and
get real good at it -- this is really an offensive weapon of moderate nuclear sized potential (remember, a rock projectile leaves no radiation behind, but those valuable core material layers will leave post crash radioactive stuff around all over the place)
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