Re: Let's look at this...
"When did physics ever Trump economics?"
It never did.
But I can remember it being theoretically impossible to get more that 9600 Baud down a phone line on a normal modem.
I remember when it wasn't theoretically possible to get more than 10M Ethernet.
Wireless in the home was always going to be very slow, and only useful for emails - if you wanted to stream music, you'd have to use wired access - and films would work, but only short ones in low definition.
True Internet over a mobile phone was never going to work at a reasonable speed....
I know that your theoretical calculations say this'll never work. But I wouldn't mind betting that you're wrong.