...He says Canon has a software that makes it possible to upsize a RAW photo almost unlimited without visible degradation....
Yes, it's a fictional software programmed in the future around the year 3500. By then Canon will have developed a sensor that works analog and not digital anymore hence the possibility to upsize without quality loss.
The "native" resolution equals to a 7.000 TeraPixel image and a 128-bit color depth. One image requires 3 Petabytes in hard drive storage. Once upsized to 100 times the "original" size in order to create a banner that wraps around the world 5 times you need a hard drive that holds about 345 Zettabytes.
The estimated price will be around $7.000 (plus tax). A bargain compared to Nikon's counterpart which probably will sell for $200.000 (plus tax).
I don't know why Canon is usually cheaper than Nikon...
P.S. If the guy IS right, send me a PM with the name of the software company - I hope they have some shares left because then I won't have to do microstock anymore for a living.