I personally own an iPhone 6s plus, an iPad air 2, a 12.9 inch iPad pro, and a 2015 macbook pro w/retina. I do notice that my macbook pro and my 12.9 inch iPad pro absolutely flies and are a bit faster than my other devices, but it still isn't much of a noticeable difference. I couldn't be more satisfied with my Apple products and don't really see how they can get much better than they already are right now. I have heard Android owners talk about how they feel that Android products have plateaued as well. What do you think?