The Apple Watch was launched in the era of Tim Cook, though I suppose it’s more “ipad revolutionary” (nobody had done it successfully) than “iPhone revolutionary” (nobody had tried). I’ll also say the AirPods are the most quietly competent products I own.
One could also argue for the M chips, which were absolutely game changing when they came out.
I still remember the first time I heard about the iPhone. I was like "this is incredible". My friend in Romania asked me to buy him an iPhone - when I told him he would not be able to use it in Romania [1] he said it does not matter, he wants it it looks super cool. When I first saw the Apple Watch my reaction was between huh and meh.
[1] As far as I remember there was only one telecom in US that was working with the iPhone. My memory on this is fuzzy, but I clearly remember telling that to my friend and his answer.
One could also argue for the M chips, which were absolutely game changing when they came out.