Sony don't have anything Apple want.
Seriously, what do you think Sony have that Apple want? The Playstation brand? That's not Apples style, and at this point in time they don't need anybody else branding to get in to the home console market, they put "i" in front of "console" and it will sell. They certainly don't need Sony's console tech, Apple are more than capable of developing their own.
Apple certainly have no interest at all in the majority of Sony's business, consumer electronics, their computer division, mobile phones, that's all stuff they would just shut down,
The only things I can see as worth anything to Apple are their patent portfolio (and then only a portion of it) and a very big *if* they were thinking of entering the gaming arena Sony do have a sizeable portfolio of gaming IP and quality development studios that someone like Apple might be interested in, but it's hard to see them justify buying the entire company.
If Sony were to dissolve then Apple will be among the vultures scavenging the corpse, but they're not going to buy the farm.