I guess it depends on one's definitions, whether a 'hardware' company should be developing new hardware technologies or assembling hardware products. For the sake of this discussion though, Aplpe's hardware is nothing without their software, so I think that underlines that Sony need a strong software arm which is what they are lacking more than their hardware. Innovative hardware is now too hard to pull off, and any company could get lucky with the next big break.
I'm not sure Apple having lots of patents counts for much either. These days anyone can patent anything even if someone else invented it, and one can also patent obvious advancements of existing tech that everyone else would invent also.
If Apple is not a hardware company, then neither are any of the motherboard or videocard manufacturers, because they're just assembling available memories, chipsets and other components. There is a lot more to the broad term of "hardware" than custom ASICs, processors, memories.
You are sort of right, in that Apple's success is careful thought put into the entire package, including the software and hardware, but I wouldn't write off the design of their hardware. Apple was the first company that seemed to realize that people didn't want ugly computers in their beautiful offices. They pushed aesthetics, and at the same time made practical and functional improvements. To use the MagSafe connector again, it was a VERY popular addition for people that frequently used laptops.
Apple will eventually lose their step, and someone else will take the reigns, but there are obvious lessons to learn from how they build their products.