Since Sony is not going to present anything at E3 2019, PlayStation CEO Jim Ryan went ahead and revealed a few more PlayStation 5 features to hype up the fans until the official announcement scheduled later this summer. The rumored custom SSD is now confirmed to be the default storage option, while the 7 nm AMD hardware will offer support for 4K @120 Hz, and there will also be a "cross-generational play" feature.
https://www.notebookcheck.net/PlayStation-CEO-reveals-PS5-support-for-4K-120-Hz-SSD-storage-and-cross-generation-play.423117.0.html