Bloomberg (for as much as their reporting is worth) gave the Series 7 screen resolution as 396x484, which would compare to the original iPhone's 480x320. As far as total pixels go, when you factor in the rounded corners on the watch, they probably do have pretty close to the same number of pixels, although squared off the new larger watches are actually a bit bigger.Someone tweeted it but I can't find a tweet but basically the original iPhone has more or less same pixels as Apple Watch Series 7. 😳
That's how time flies.
I didn't even bother trying to compare specs from the original iPhone to today's model since the advances are in most cases multiple orders of magnitude. It only even became interesting pitting today's phone against that era's top-of-line full-sized computers.
I remember some time around probably the iPhone 3GS or maybe 4 thinking, "The day will come not all that long in the future when I can buy an iPhone that is faster than any desktop of today. It feels weird, and almost inconceivable but it's inevitable." I'm not quite sure when that day was, but we're certainly past it now, and the mind-boggling power of the little boxes in our pockets has become so common that I didn't even notice by the time it happened.