That's a good point. I don't mind paying for data, but I don't want to pay for the advertisements to be downloaded to my phone. It doesn't matter as much at home where the data is unlimited. The phone should be too.
I actually see 2020 as a rather modest ambition for 5G. We're supposed to ahve 4G already and it's 2013. If it takes every seven years to update the network, then that's moving at a significantly slower rate compared to what we've had to this point.
The goal of 10-20 Gb/s throughput is extremely ambitious...it will take a while to figure this out how to do it, if it is at all possible...higher frequencies (smaller wavelengths) bring up severe signal attenuation issues so this is not simple scaling of frequencies up and we are done...Kris