AMD still have nothing to compete so Nvidia is in no rush
AMD are playing the long game and we are seeing the fruits of their labours with the Zen2 architecture. It is doubtful that they will take the performance crown this generation, but I would not be surprised if the net generation brings a very different picture, with AMD's new technology maturing into a powerhouse, funded by massively increased operating profits and a lot of experience gained in the console arena.
Nvidia need to really start thinking about how the next decade is going to turn out, because while they are still making great strides in graphics technology, I can feel them starting to gradually focus more on the data center, cloud and automotive industries where they have the potential to cement themselves as the leaders and innovators in these fields which will bring in HUGE profits as the demand for this technology increases almost exponentially over the coming years as automation and AI continue to explode. Shareholders will be putting a lot of pressure on Nvidia to keep putting resources into these markets, whereas I think AMD will be able to stay more focused on the CPU/GPU markets.
I think that long-term, AMD have a real chance to snatch the prime position in the gaming market with the solid architectural foundations that they have been building during the last few years.