Many companies bought loads of computers (especially laptops) in 2020 and 2021. Therefore it's hardly surprising that there is now a slump in sales as none of these devices are due for replacement yet.
I'm really not sure what "AI" - a solution looking for a problem to address, in many industries - has to do with it - users are still going to need client devices, whatever they are using them for, and the over-hyped AI isn't going to suddenly require a radically different type of device!