I watched an interesting stream last night about Ampere. It raised some decent theories.
As we know, we were supposed to get Ampere ages ago. Then all of a sudden it's Turing and it's really expensive. They suggested Ampere might not have been ready, or even working properly, hence the "Bolt the RTX stuff onto Pascal" which would have been expensive.
Which suggests that yes, Ampere should be a fair chunk cheaper. Now whether or not we will see that as buyers? who knows.