According to Twitter leaker WalkingCat, Microsoft will reveal Cloud PC at its Inspire event on July 14-15, 2021.
Deschutes (Cloud PC) announcements => Inspire— WalkingCat (@_h0x0d_) July 3, 2021
A screenshot of CloudPC was leaked last month.
In case you're wondering, yes... this is Cloud PC. I thought it was going to be announced at the Windows event ???? https://t.co/B90wgxUUVT— Aggiornamenti Lumia (@ALumia_Italia) July 3, 2021