The last few Android releases have all been about refinement instead of overhaul. We're well past the point where a new version of Android introduces a boatload of new features; instead, Google is all about tightening the security, making Android easier to use across form factors, and delivering a consistent design.
That's the case with Android 17 as well. There's a decent selection of new stuff this time — including a new multitasking mode that actually makes sense — but the overarching theme is around usability; whether you're on a foldable, tablet, in the car, or a regular phone, Google wants to make Android 17 look and feel the same across all your devices.