Pretty positive. I mean, If someone like me who hasnt played more than 10 minutes of Pokemon before Pokemon Go in my life, is going to buy it. I am sure, more casuals will.

The second hand market on old Pokemon games has duplicated 3-6 times the price before Pokemon Go and people are getting hyped about Sun and Moon here in Sweden for sure.

ORAS has more than tripped it's weekly sales in Japan, (~3,000 to >10,000) so it's working! Sun and Moon will definitely receive a boost as well.

There's certainly going to be an impact. Gamestop has already upped the prices of their used Pokemon games (presumably because they started selling a lot more of them) and believe it or not, people who've never played Pokemon are trying and liking Go.

Not sure if it's be a HUGE bump, but Sun and Moon are definitely going to benefit from Go's success (unless they keep making updates that make the community hate them...)