Thats the world of personal computing today. It doesnt matter if youre running Windows, Mac OS, or Linux. Your machine is almost certainly using Intel chips at its core and almost everything else is fairly genericeven the worlds greatest case mod with water-cooled dual-Xeons and quad-SLI graphics is just a really fast PC.
Interesting article but I don't really buy the analogy. Their 'diverse' computing world would be if everyone had different vehicles - that each had different, incompatible propulsion methods. Gas-engined vehicles would need to scope out an appropriate gas station, hydrogen vehicles the same, electric vehicles would need a power station, and the like.
We have plenty of different models of computers that all have features in common (x86) that allow us to run many varieties of software and operating systems with very little inconvenience.
It's a great time to be in computers!