It's pretty much a certainty that Nvidia will be announcing their next generation of graphics cards at their upcoming "spectacular surprises" event this coming August 20th, shortly before Gamescom 2018. Some possible details have been revealed now through a teaser trailer, however, and the naming may not be what we're expecting.
Rather than being named the GTX 1180, as many expected, the next generation may be named in the RTX 20xx series, instead, meaning the launch card will likely be named the RTX 2080. Now, graphics card numbering has long escaped us and it is all very much arbitrary, but it's an interesting twist, perhaps for the sake of being a twist, although the RTX replacing GTX is likely to be a reference to the cards' ray tracing capabilities.
The trailer above, clearly signposting to a new graphics card aimed at gamers, with tag line "Be For The Game". The video is chock full of possible spoilers / easter eggs, for example at the 40 second mark, where a user named "RoyTeX" (RTX) posts an emoji of a flexed arm.
Where this gets interesting is at the 44 second mark, where a conversation between a user called "Not_11" and RoyTeX ends with Not_11 saying "eating, gimme 20" - this is of course circumstantial reading between the lines, but at the 45 second mark, there is another conversation shown between "Mac_20" and "Eight Tee", which also seems to hint at the new naming scheme.
So it's not concrete evidence, but it does appear at Nvidia hinting toward the next generation of cards being in the RTX 20xx series. What all these new abbreviations mean and why, well, maybe we'll find out on August 20th.
Of course, the important thing is how these new cards perform, their pricing and power consumption. No other details have been released as of yet, but it's very likely this next generation of cards will focus heavy on the ray-tracing capabilities that RTX stands for.