Looks like I nailed most of it. So, who is going to build a proof-of-concept scale model of this thing a few kilometers long?
Tunnel is pressurised - wrong.
Use of the word "loop" means that something is 'recycled' - wrong.
Parallel tracks used for acceleration - wrong.
Carriages help push each other - wrong.
Internet analogy - wrong.
Summary: scaled up pneumatic tube - wrong.