That's less than a 3% increase in transistor density. The reason for this is the fact that TSMC's "12 nm FinFet" is actually the same node as TSMC's "16nm FinFet" and is actually TSMC's "20nm" node. "Third generation 20nm" would be a more fair description, if we follow Intel's standard. If this was a real node shrink well see a close to doubling in density. So remember this, TSMC's "12nm" is not a node shrink
GV100 will not arrive in any consumer product anytime soon, perhaps never.
One customer being "satisfied" doesn't prove anything.
Not to spawn another discussion, but stutter is one aspect where AMD still have a lot to improve in their driver.
Linux might not have the same game selection as Windows, but as anyone into professional graphics would know; Nvidia is the only vendor offering enterprise quality drivers for Linux, and the drivers are even more stable than the counterparts for Windows.