"Imagine if computers had the same capabilities, the same CPU speed, the same RAM, the same form factor, the same monitor resolutions, as they did in 2008 but cost a lot more. Who would still be buying them?"
Yes we would. We get value from them. Bigger and faster is nice, but we wouldn't stop using computers if they stopped getting better. My car is a 1999 model but still gets 37mph, can go 100+mph, AC/radio works, and is drivable. New cars aren't appreciably any faster, larger, more fuel economic, or better, yet cost a whole lot more. But there are plenty of dealerships out there selling them every day.