I refuse to get my hopes up.Double up 5700 XT is greater than Turing +20% IPC, and that's before you factor in the RDNA 2 improvements. In terms of raw performance, I think RDNA 2 and Ampere are going to be pretty close for a change. As for ray tracing, who nows. 4x RT performance on Ampere brings it up to usable across the stack, but AMD said they were only releasing RT capability once they could offer it across the entire product stack.
I think we're in for a pretty tight battle this generation.