It's a strange article for THIS audience, in that we are power users of technology. We don't buy the cheapest machines on the market - we tweak the best ones on the market.
That said, Apple is succeeding with folks less like us. Folks like our parents, who never heard of disk defragmenting. Uber-Cheap Windows machines do indeed fail this market. The buyers do get what they pay for, but it's also because they don't know better. Those folks are who this guy is writing for.