yeah, I'd heard that, and it sounds awesome and exceedingly smart. A very needed thing if we are to keep increasing screen resolutions, and that's a rewarding thing to do, so we should.
But there are two things I just don't get here. First, if I change the screen resolution on my powerbook, guess what? Sizes still change. Why? is this a feature that's just "not turned on"?
Second, if that's the case, why does apple not ever increase the number of pixels per inch beyond a certain number, and instead prefers to increase screen size? As it stands, apple is using really low res screens, presumably to keep text from shrinking, and also offer some of the largest screens around.
And still, can they make it completely scalable? I mean, say I've got the letter l, and it's, say, two pixels by 10 pixels. So, we could scale it to 4 by twenty, no problem, except we'd have a goofy looking l unless we had really, really high res screens. But what if we haven't quadrupled the number of pixels per screen (see, that's doubling in both directions, and also a kind of nasty thing to do, because dead pixel count goes up, and its' just a lot of pixels), how do we do things? Because you cant scale to two thirds size. You could round in the vertical direction, because nobody will notice between 13 pixels and 14 pixels, but you can't light up one and a third pixels. One makes your letters skinny, two makes them fat, and one third does not exist.
So how are we supposed to use HD unless it's extremely, extremely HD, where we rarely have to bother with things on the width of one pixel.