At a complete guess, the non-pro model will arrive in around 2025. It will have the same M2 chip as the current one, and less or lower quality sensors/cameras, and maybe a cheaper and/or non-replaceable strap (I'd lean towards the former as selling extra straps will be something they'll want to profit on).
By the time it comes out the pro model will move to the M3 or M4. Storage will also be lower on the non-pro model, and you wont get the same level of sound quality (Which for 99% of people wont matter as they'll have Airpods being existing Apple users).
Apples historically launched pro products, and then when its ready for a performance and/or feature bump it's passed those old features down to the non-pro models. Think TouchID and FaceID for example.
By the time it comes out the pro model will move to the M3 or M4. Storage will also be lower on the non-pro model, and you wont get the same level of sound quality (Which for 99% of people wont matter as they'll have Airpods being existing Apple users).
Apples historically launched pro products, and then when its ready for a performance and/or feature bump it's passed those old features down to the non-pro models. Think TouchID and FaceID for example.