Apple is really keeping things under wraps if something is about to be released and no one has any more definitive info on it.
It’s hard to imagine Apple not releasing anything new before the holiday season which often generates a sales boost. If not October then maybe November?
I don’t think iMac getting M3 would really cannibalize MacBook sales because they’re different markets even with M3 outperforming M2. Most people buying a MacBook want that element of mobility you don’t have with a desktop, and M2 MacBooks are hardly slouches in terms of performance. Hell, even the M1 MacBook Air is still a beast in its own right—still one of the best bang-for-the-buck computers on the market.
The M3 iMac is a given—it’s just a matter of when. At this point, though, a larger iMac would be a surprise as I expect it would be expensive though perhaps not as absurd as the old iMac Pro.
The MacBook Air situation is…messy. How much longer will the old M1 Air be kept around? Most everyone thought the new M2 Air would replace the M1, but that didn’t happen. As it is there are essentially two entry level MacBook Airs. Is it conceivable Apple will eventually drop the old Air and adjust the price accordingly on the new 13 and 15 models? Or are they going to revamp the old Air and keep it as the entry level MacBook?