@Fenix This escalated after an interview with an engineer from Epic China (which has since been taken down) revealed the demo seen running on the PS5 ran just as well on a laptop. In fact the PC reportedly ran the demo better, with the PS5 managing 30fps at 1440p while the laptop hit 40fps at the same resolution from within the editor itself.
The laptop in question is no slouch mind, featuring Nvidia RTX 2080 graphics and a 970 Evo Plus. Epic's CTO, Kim Libreri, has already confirmed to us that you'll get "pretty good" performance with UE5 running on something like an RTX 2070 Super, but having a more specific performance figure is always good.
