From the Dualsense controller (haptic feedback, adaptive triggers, 3D audio), to the rehauled UI including the activities tab (potentially a major QoL improvement, if you can access game modes directly from the UI, rather than the main menu), the SSD/IO (virtually no load times/faster installs), to games like Demon's Souls, Astro's Playroom and Ratchet & Clank demonstrating next gen capability, the PS5 feels a lot more next generation than the Series X at the moment. Most of the features that the PS5 is missing are minor and can be patched in anyways.
BTW, I seen a couple of users compare the haptic feedback to the Switch's rumble, but we have a few reviewers claiming the haptic feedback is superior. Also, adaptive triggers are more natural to implement into a game, than say the touch pad on the PS4, or even something like gyro aiming. It remains to be seen if the Dualsense is a gimmick but as it stands right now, a ton of third party games are utilizing its features, including CoD, Fortnite and 2K.