I think it makes sense. If you and your competitors are sharing all the supplies, then you can compete only by lowering prices and adopting new technologies faster than your opponent. Hence why they need to discount older products, and why 90% of the stock is sold in a month.
The same situation happens in the Android world too. Every couple of months a new mobile becomes the "leader" of the Android OS, the hardware to have.
Also PC manufacturers only adopt quickly those technologies that are obvious upgrades: a faster processor, more resolution, more memory, etc... But they are worried of adopting some more disruptive technology too quickly for fear that users may decide they prefer the old tech and hence they avoid their new models.
Not surprisingly then Apple is slow to update its lineup, but it's one of the fastest to adopt really new technologies: 3" floppy drive, USB, DisplayPort, trackpad, Wi-fi, etc...
> We study the effect of market structure on a personal computer manufacturer’s decision to adopt new technology. This industry is unusual because there exist two horizontally segmented retail markets with different degrees of competition: the IBM-compatible (or PC) platform and the Apple platform. We first document that, relative to Apple, producers of PCs typically have more frequent technology adoption, shorter product cycles, and steeper price declines over the product cycle. We then develop a parsimonious vintage- capital model that matches the prices and sales of PC and Apple products. The model predicts that competition is the key driver of the rate at which technology is adopted.