I can't explain how excited I am for this. I actually still own my old Demon's Souls copy and a PS3. And while the company that maintains the servers for multiplayer has decided to do so indefinitely, playing it on PC with friends sounds like it'd be wonderful.
Demon's Souls had some concepts I missed in Dark Souls, and was actually my favorite of the series (having never played Dark Souls 3, Dark Souls was definitely good, and Bloodbourne was different but good, while Dark Souls 2 was a shell of a Souls game).
The bigger thing being that progress has been made towards PS3 emulation and that is exciting.