It will be identical to now ... with M3's
I wouldn't overthink it.
Apple has stopped doing anything really that innovative in the laptop space (sadly)
I don't agree. M chips made a truly performative fan-less laptop a reality. Pretty innovative to me. Same performance on battery as with it plugged in. Pretty innovative.
Light yet durable, compact yet a lot of screen. There are tons of windows laptops like an m2/3 air? No. Sure they may have better specs, some components, and performance but they will need fans, will heat up more, and do not have a similar build quality for a similar price with some exceptions.
So basically there is nothing else like an air if you want an ultra portable laptop that can actually do some work all without breaking much of a sweat and lasting all day on a single charge.
Could Apple make some meaningful upgrades to the air line that are already in Windows laptops, yes! But Apple is Apple and they will squeeze every dollar they can. So a 60hz non touch LCD IPS display is the compromise you make compared to say a 120hz touch gorilla glass OLED 2.k panel in some competitions at a cheaper price.
What do you define as innovation. A complete redesign of the laptop chassis? A new chip architecture? Unified architecture? What would satisfy as innovative because the more I go the more innovative yet done in a tasteful non guady way the MacBook air M2 is.