NVIDIA has decided to hold off any GTC 2020-related announcements for the time being. Previously, NVIDIA CEO Jensen Huang was expected to deliver an online-only keynote but even that stands cancelled as of today given the increasing need for people to focus on personal health amidst the COVID-19 pandemic.
https://www.notebookcheck.net/GTC-2020-NVIDIA-holds-off-sharing-exciting-products-and-news-amidst-COVID-19-concerns.457648.0.html