It seems more baked in this time, with metro automatically engaging two different scaling targets (full hd and 2560x) as well as the baseline ~100dpi. So people

It seems more baked in this time, with metro automatically engaging two different scaling targets (full hd and 2560x) as well as the baseline ~100dpi. So people will be in hidpi modes without engaging them, and a good number of them since 10" full hd is looking like a high volume form factor. All of the ui elements are vector, fonts obviously are, and there is built in support for switching out bitmaps for the 3 stated targets - even in css from the internet. Visual Studio 2012 has these dpis built in to its ui builder previewer along with the typical form factor previews. I guess time will tell but it certainly feels like the most credible attempt to date to me.