According to the document they have up there, SF2E will be 100% compatible with PF2E. That's a huge win for me - I like Starfinder's setting and vibe, and love PF2E's action economy.
Super excited about this! Pathfinder 2e has become one of my favorites for a "Modern D&D" experience, so I'm interested to see it incorporate sci-fi elements.
Plus, with a little tweaking, it'll be another alternative to use for a Shadowrun campaign. :P