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Microsoft yesterday detailed the improvements that are coming to Windows 8 touch hardware. Microsoft introduced a set of touch interactions that make up the Windows 8 touch language and they have engineered the experience to be consistent across variety of hardware that would be able to run Windows 8. So as a result of this, you can expect any Windows 8 PC/Tablet on market will work as expected without any issues.
Read more on this at Building Windows 8 blog.