During last year's E3 presentation, Microsoft confirmed that they are working on new consoles. Little else was said, but sources since then have claimed that Microsoft is developing a true successor to Xbox One and a cheaper model that will rely heavily on Project xCloud to run more intensive titles. These two consoles aren't expected to launch anytime in 2019, but we may be hearing more about them quite soon.
According to the latest from Thurrott, Microsoft is planning to show off the two consoles, code-named "Lockhart" and "Anaconda," at this year's E3. They're not expected to confirm a price point yet, but they want to "begin to peel back the onion on these two devices." Thurrott expects the consoles to launch sometime in the Fall of 2020. French gaming outlet JeuxVideo has published a separate article stating much the same.
Thurrott also claims that we'll be getting a big update on Halo Infinite during Microsoft's show, and it will be confirmed as a launch title for the next-gen devices. Thurrott claims the game's story will adapt to player choice, and it may feature more RPG elements than past entries in the long-running franchise.