I think you seriously overestimate console market. Back in 2011 Sony reported 56 million PlayStation 3 units sold and Nvidia made $500M in royalties from it.
https://www.extremetech.com/gaming/150892-nvidia-gave-amd-ps...
Considering there is a lot more alternatives in SOC market now I seriously doubt Nvidia margins become any better. I don't mean that $500M is little amount of money, but it's simply can't justify market cap growth.
UPD: My bad, there actually some data on it and I can be wrong:
http://www.gamesindustry.biz/articles/2017-05-10-nintendo-sw...
Though I still don't think growth can be really related to console itself.
Today, with the stock up more than 250% in the last 18mo., the implied market size (and market share) estimates in the stock are already pretty ambitious. In my opinion, they're not too ambitious, but the question now becomes, when will it become clear that they are conservative? What will it take? SoftBank has a long time horizon, they're comfortable waiting for when this happens, whether it's in 4 quarters if datacenter growth grows from even these remarkable levels or in 4 years when the autonomous driving market with be beginning to take shape...
https://www.fool.com/investing/2016/09/26/will-the-nintendo-...