Well, my MBA 11” i7 2013 (5 years old!) suddenly seems much more spritely. Still good for another five, I think.
Of course, by then, the most affordable Mac notebook ever will be $2,000+ and the keyboard will be replaced by sharp pieces of glass.
On a side note: It really annoys me when they stand there on stage and say This is our best whatever ever! Really, I never expect them to come up with something crapper than before, at least in their eyes (well, except the Mac Mini 2014. Even Apple knew they were screwing folks with that one.).