For now, the reliable way to play on November 19 is still a PS5 or an Xbox Series X or S. Sony holds the marketing rights to the game, and Rockstar has promoted it as playing best on PS5, though Xbox insists GTA 6 pre-orders on its consoles are in line with how many Xbox consoles people own.
If you do not own a console and hoped to stream on your PC, that is off the table. If you play on a phone, tablet or TV, wait for Microsoft to confirm device support before counting on it. And if you already own an Xbox, cloud streaming would be a nice extra rather than a reason to change how you buy the game.
At the same staff meeting, Sharma also said the coming Xbox hardware, code-named Project Helix, will span several devices, and partner companies will build some of them. Microsoft and AMD announced a multi-year partnership last year to work on a range of devices, including the next Xbox console.