It appears Sony might be preparing for PlayStation 5 pre-orders as new headers featuring titles like Gran Turismo 7 and Demon's Souls have appeared on some official media channels. Devs have been singing the praises of the PS5's SSD and Tempest 3D AudioTech engine, but it appears the next-gen console won't have an optical audio out port.
https://www.notebookcheck.net/Sony-gears-up-for-PlayStation-5-pre-order-pandemonium-with-new-headers-and-devs-hoot-about-the-PS5-SSD-and-Tempest-3D-AudioTech-engine-but-there-s-no-optical-audio-out.491251.0.html