Ok lets have a lesson in Physics better still geographical economics?. currently this so called "finite" resource can throw 25-35Mbps around your home and soon you will get a 100Mbps. You see unlike Europe, NZ is an Island in the middle of the ocean isolated from the rest of the world spectrum wise and with a small population we have a 100 times more spectrum than we could possibly use. ( for now)
I have been a radio tech since I was 15 and deployed my 1st city wide broadband spread spectrum network in 1992 and I count as my friends some of the most qualified radio engineers in the country and after many such discussions the issue that NZ would ever run out of spectrum has always yielded the conclusion that it will not any time soon.
However if you can gather up some kind of evidence to convince otherwise send it to me..... I think you would be better off not suggesting something that is not entirely correct at least in the 21st century here in NZ.
FYI Low voltage home appliances like alarms, intercoms and air conditioning are normally powered via cable to reduce battery maintenance issues and that's why the CHORUS proposal to fit a separate power supply with separate batteries will not get traction. Home owners will want a single universal home backup power supply not a string of battery boxes around the home.
CHORUS have indicated their new device will not suit new homes and also those existing older homes already re-wired for broadband?.. so ask yourself what's the easiest solution to improve broadband in those older wiring situations ? the answer is wifi or run a new piece of Cat5/6 ..who needs the magic box ? the answer is CHORUS.