"Great artists steal." Jobs identified an overall vision that was something like "to sell great technology." This later became refined into something that was a little "different" as Apple latched onto the "better alternative" image when confronted with clone PCs.
Jobs was always on the lookout for selling points, the "one more thing." But the impact of objects as a selling point through NeXT and WebObjects on Apple's consumer-focused tech is only skin deep, because creating a comprehensive system would have taken much longer, but it was enough for Jobs to impress people, and provide an essence of an advantage. This was clear in at least early versions of OSX (I haven't used OSX for years), where drag and drop between identifiable objects worked… sometimes. The remaining functionality would have been much harder to achieve, and would have meant something really significant was being built, rather than what became a current generational marketing push. The idea of an object oriented system isn't talked about much anymore, and Apple really focuses on Raskins' ideas for interface, which aren't really compatible since it focuses on one object at a time, rather than a system of objects.