I have attended TGS in the past. I just received the email from the organizers stating that this year's show will be held online due to the coronavirus.

Email Below :

TOKYO GAME SHOW 2020（TGS2020）, scheduled to be held from September 24 (Thu.) to 27 (Sun.), 2020, is now planned to take place online. TGS2020, which is usually held at Makuhari Messe, is cancelled. TGS2020 is organized by the Computer Entertainment Supplier’s Association(CESA, Chairman: Hideki Hayakawa) and co-organized by Nikkei Business Publications, Inc.(President & CEO: Naoto Yoshida) and Dentsu Inc.(Representative Director: Hiroshi Igarashi)  Due to the outbreak of novel coronavirus (COVID-19) on a global scale and the situation remains unpredictable in Japan as well, the organizer and the co-organizers have reached this decision after a long consideration to place the utmost priority on the health and safety of visitors, exhibitors and stakeholders. We ask for your kind understanding and cooperation.  More information will be announced as needed on the official website ( https://tgs.cesa.or.jp/en/ ) and press releases from late May.

It is in September and they are already cancelling, yes COVID is here for the long term.

2020 is canceled.

Is there going to be any videogame event left?

This year? Only online.

For the years after? Yes there is, just not sure for how long.