It's not saying that hardware and software doesn't matter. According to their definition, Nokia lost because design (software) is secondary to hardware (engineering).
Actually, the article brought up a very good point: "In comparison to early mobile phones, most smartphones on the market today look identical."
And what do they look identical to? The original iphone.
Most hardware manufacturer are trying to compete on Apple's turf. The result is that most consumers will naturally compare their design to Apple's. It's going to be extremely difficult to catch up.
Remember the original Apple's phone collaboration with Motorola?
That's Apple trying to compete on Nokia's turf. Result: Failure.
Now the mobile manufacturers are trying to compete on Apple's turf essentially by mimicking iphone. Is it any wonder that they will find a hard time competing?