Nintendo: I'm not entirely sure how well Switch will do yet. There's some hype on forums like this, but nobody I know is getting one or talked about it much. It doesn't appeal to me and I'm afraid the 3rd party situation will be as bad as Wii U, but being portable will at least make it sell better than Wii U.
Sony: Strong lineup of Western games, and increasingly more Japanese titles seem to have increased sales in Japan which will likely make 2017 the best selling year for PS4. Overall the trajectory is a lot better than the PS3 and I expect it will pass 110 Million.
Microsoft: Somehow failing to have much hype around it's games, though has had some really good ones, and continues to sell well in US. I expect it will sell around 50 Million.
