The site says NVIDIA may do a vague "appetizer" at one of these conferences, but an actual product reveal or launch shouldn't be expected. This rimes with NVIDIA CEO Jen-Hsun Huang's recent statement that Pascal would continue to be the best gaming platform for the foreseeable future.
Interestingly, the site claims that NVIDIA will keep a clear separation between its datacenter and consumer products. While various rumors pinned Ampere as a Volta-based product for the gaming market, it appears there will not be any consumer offshoots of Ampere in the near future.
Instead, NVIDIA is working on Turing. First covered by a Reuters report a couple of weeks ago, Turing is believed to be a new gaming architecture. Tom's Hardware claims mass production of Turing-based cards isn't slated until mid-June, so a hard launch shouldn't be expected before July. Basically, a launch of new-generation NVIDIA gaming GPUs before Gamescom seems unlikely:
Tidbits we’ve heard from various other sources with knowledge of the situation also suggest that the mass production of Turing cards will not start until mid-June, and thus a hard launch of board-partner cards is not expected before July. This should rule out a rollout even at Computex in Taipei in June, although we may see some non-functioning mockups.
It looks more likely that the venue for the big unveiling of Turing-based partner cards will come at Gamescom in August, at which time gamers will be able to get their hands on the them--if the crypto miners don't eat up the supply straight from the factory.