The above chart lists the common (but not the only) resolutions that Microsoft is planning for, and while most of the listed display types won't surprise anyone (wall-to-wall 1366x768 and 1920x1080 for most desktops and laptops), it does appear as though Microsoft is planning for Windows tablets with a DPI that approaches or matches that of the new iPad.

Microsoft is planning for tablets that use both the 1024x768 and 1366x768 resolutions common in earlier and lower-end tablets as well as the high-DPI screens that are being (and will be) ushered in by the new iPad. To scale Windows elements so that they're still comfortable to look at and touch at these resolutions, Microsoft has put together some pre-defined scaling percentages: 100% when no scaling is applied, 140% for 1080p tablets, and 180% for quad-XGA tablets like the new iPad. These percentages were all chosen as "pixel density sweet spots" for 10" and 11" tablets with 1920x1080 or 2560x1440 displays. It should be noted that Washington's blog post focused entirely on Metro scaling - whether the Windows desktop will automatically scale using these percentages is unclear.