I agree, in landscape mode it seems like there is little difference until the guy in front of you decides he needs to lay down in your lap the whole flight. Then, I’ll take as much space as I can get.
Ironically, the area I see the biggest difference is in security. Every flight with the v2 I had to take it out at the security check like my laptops. But, I’ve yet been asked to take the v3 out. “Oh, it’s an iPad? No reason to remove it” is the typical response now. So, there are big differences to me.