Basic requirements look like i7 or i5 processor with Intel HD 3000 integrated graphics and a Centrino Wireless N adapter. The latest laptops my company ordered in from Dell appear to fit those hardware requirements. However, it didn't have any WIDI software pre-installed, which may be a problem since one of the requirements is pre-installed Intel My WIFI software. I'll give it a shot when I'm back in the office, next week.
The drivers are here:
Intel® Wireless Display — Software and drivers for Intel® Wireless Display
Requirements are on this page:
Intel® Wireless Display — System requirements for the Intel® Wireless Display