Because those two industries aren't successful without Apple's push....
Did they INVENT the rounded rectangle? No....was the smartphone a successful product before Apple? No. Same with the tablet. Now look at how ubiquitous they are.
To a certain extent, he's overstating - but not nearly as much as some people try to claim. Fact of the matter is, the iPhone and iPad have dramatically changed personal and mobile computing. Despite the fact those form factors existed before Apple, they weren't successful until after Apple.
Honestly, I don't think Samsung would be as innovative in the smartphone business without Apple.
For example, lock down Apple campus for 5 years. No one at Apple can see what new phones are being created by the competition. Apple employees can only follow advances in chip design, cell networking, etc. Only components that are included in the phone.
I bet you any money within those 5 years, Apple will have something amazing to release for a new iPhone model and put Samsung back in time again.
They did it with the first iPhone. It can be done again.