New PC Demand in a slump

Tablets get the blame. I can understand tablets being the cause of not buying a second or a third laptop for the household, but delaying replacement of laptops strikes me as more likely to be a result of software not catching up with hardware development. What, exactly, is a three-year old laptop not going to be able to do for you? Hardcore gaming and serious video editing (even the iPad can now do casual video editing)? Those aren't things one generally does on a laptop to begin with (and the sort of people who buy $3000 laptops to do that probably are still swapping them out on schedule).