This seems to be an example of how different products will always find some people who get upset about it. I am in places with slot machines once in a blue moon. If I was there and saw a D&D slot machine, would I play it? Sure, on a lark.
Am I really excited about this and going to go somewhere because they had the slots no? But as far as the pinball game goes, that's something else. But then I play pinball already, and I'm sure that would be fun.
D&D has been branded on every product imaginable. I have some old D&D notebooks, and had a D&D lunchbox as a kid. It's just branding, and life will move on.