Why exactly does a larger display on a phone make it modern exactly? It just makes it bigger. I'd say the main thing a person wants in a pocket computer is the ability to fit in their pockets. The larger phones now require bags to carry them around. I wouldn't exactly call that modern since laptops have been around for over 20 years.
What exactly does a thinner casing on a phone make it modern exactly? It just makes it thinner. I'd say the main thing a person wants is an great all in one device without the need to carry additional dongles and adapter. The thinner iPhones 7,8,9 without the 3.5 mm audio jack now requires millions of users to carry an external DAC amplifier with them. In addition to the DAC which they already have built in inside their iPhone - but useless when then a headset is connected.
But yes, maybe I would call it modern. The modern world of the new Apple with soldered RAM, standard laughable 5400 drives and disappointing Desktop Computers. With justifying customers like you, MAC128, everything is possible these days.