Not a great fan of apple tech if I'm honest, but I'm well aware that my android phone probably wouldn't be in my pocket right now if not for him. Oh and he bought PIXAR too, so there's a pretty good chance all the CGI movies like Toy Story etc, would never be so popular, if even exist!
Even if you didn't like the guy, he certainly pushed others towards doing better, and surely that's a good thing for everyone!