You guys know you can make the icons have more pixels, WxH, right? Doesn't seem like it'd be a hard feature to implement in an OS.
I'd love to have a higher resolution screen in my phone, and they are coming, but I think it'll be a while before we see 1920x1080 displays.
It isn't hard for Apple, they have 3 resolutions to support, and one of them is just a 2x scale up another. It won't be hard for Microsoft they are controlling the specs on their devices. It shouldn't be hard for HPalm, they are/will be making all their own devices. Finally, RIM won't have a problem for all the same reasons.
Android will have the problem, anything from 320*480 to 1024*640, and beyond, and in many cases the aspect ratios do not match up. You have 854*480 on the Droid, 960*540 on the Atrix, 320*240 on the Flipout and 480*320 on the Backflip. And that is just Motorola.
As I said, the OS needs to be able to adapt to all these different resolutions, because HTC, and Motorola and Samsung and all the makers can put any UI they want onto those devices but if the Bob's Burgertown App doesn't follow the guidelines from Google telling them how best to account for the 27 different resolutions and aspect ratios on all the different devices, you will get icons that are nasty looking for whole new reasons.
I am not saying that it is impossible, I am not saying that Google is going to fail, and if it wasn't for the reasons that I outlined above that excludes all the other major players, I wouldn't only go after Google (and I don't really consider what I am doing as 'going after them'). I am just saying that when the incredibly high resolution displays start hitting with 300 dpi+ then the OS makers need to have a plan in place on how to address it.