Have you read the "Applications" section (for the 1st-gen drive) on the EmDrive page (
link)?
"For a typical 3 tonne geostationary communications satellite, with a 6kW solar power capacity, replacing the conventional apogee engine, attitude thrusters and propellant with a microwave propulsion system would result in a reduction of the launch mass to 1.3 tonnes. The satellite would be launched to LEO, where solar arrays and antennas would be deployed. The microwave propulsion system would then propel the satellite in a spiral trajectory up to GEO in 36 days."
That's a VERY slow lift-off, but it's cheaper than rockets.
Or their Future page, with the terrestrial applications of the 2nd-gen drive (
link):
"Typically 3 tonnes of lift could be obtained from 1kW of microwave power."
I'm not clear if that means that 3000 tonnes of lift could be obtained by 1MW of microwave power. Does it scale that way? I think it scales linearly with power, but sigmoidally with velocity.