Why are people worrying about the lack of ethernet, almost everyone has an arm and a leg, and that's how much the (easy to lose, misplace, or have stolen) thunderbolt to ethernet adaptor will cost. No problemo. 
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This reminded me how great text looks in windows...finally with retina we might see some good looking text on the mac (which as an aside won't need any font smoothing anymore with retina - apple doesn't do font smoothing on ios with retina), when if ever we lll get the chance to put some custom sized font on the interface is anyone's guess, probably never.
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Looks fine. I'll give you a quick example.
This is the default 100% whatever DPI. Decent enough for my 1920x1080 monitor.
This is it bumped up to 150%. Not blurry in the least, just...overly large. Which wouldn't be a problem on a 2880x1620 monitor. It'd be the same size as the default, just crisper.
This reminded me how great text looks in windows...finally with retina we might see some good looking text on the mac (which as an aside won't need any font smoothing anymore with retina - apple doesn't do font smoothing on ios with retina), when if ever we lll get the chance to put some custom sized font on the interface is anyone's guess, probably never.