https://thenextweb.com/gaming/2019/06/12/microsoft-project-scarlett-backwards-compatibility-four-generations/

In the midst of the rest of the news from E3, Microsoft quietly revealed it’d no longer be adding older games to its Backwards Compatibility program, but that it would be striving to make those games already part of its library capable of running on its next-gen console, codenamed Project Scarlett. It seems Microsoft‘s realized its got a leg-up on Sony when it comes to backwards compatibility — and it may be the best decision the company could make.

As its eternal frenemy Sony sat out E3 this year, Microsoft basically had free rein to show off Scarlett. It didn’t reveal its next-gen console per se, opting for a dreamy hype video in which developers talked up the new system. It emphasized the power of the hardware, including the new SSD and 8K-ready graphics. But it also slipped the phrase “four generations of content” in towards the end of the trailer, and later confirmed via the Project Scarlett site that, “Thousands of games across four console generations will look and play best on Project Scarlett.”