At this point, we actually don’t know when the Nintendo NX will be revealed- the original rumor was for September, but that’s seeming increasingly unlikely as more and more of this month passes. A report that emerged last week said that analysts are projecting reveal for the console in October, now, which is a point that The Wall Street Journal’s Takashi Mochizuki recently stated on Twitter, clarifying the notion that if we don’t get to see it by TGS, we will probably not see it announced till next month.
The NX was not the only console he talked about, however- he also noted that Damien Thong, the lone analyst who correctly predicted the existence of the PS4 Pro and the PS4 Slim, was also predicting that the PS5, as in the successor to the PlayStation 4, will be arriving in the second half of 2018.
That would… honestly be a bit too soon for my liking. The PS4 Pro just launched, after all, and in 2018, the PS4 itself would only be five years old. I think Sony would do well to hold off on introducing a PS5 for a good while.