Agreed. And Id prefer they return to 5x4 for all tablets and tablet PCs. I had a tablet PC back in 04 that was a 5x4 ratio Toshiba R10 and it was marvelous. I ran Linux on it! 16 years ago!
I don’t know why, but those proportions rather perturb me. Being so used to having displays be wider than tall, that almost looks taller than wide. I think it’s fantastic that it exists, though.
More expensive for a 1:1 16in than a 16:9 16in. Also 16in is usually 15.6.