There all at home we have 4 laptops, only 1 is compatible with intel widi compatibility specs. The others latops are i5 with dedicated video graphics and Windows 7 x32 & x64, 2 laptops has realtek wireless card and broadcom card.
You know there a way to use the other laptops with WIDI ???? With a USB card is possible??
Another solutions could be change de wifi pci-e card of the laptop right???
Please note that so far we do not have a usb solution in order for a laptop to support wireless display, and if the laptop was not validated to support this technology it will not work, the laptop needs to be designed to support the technology, you can find the system requirements at the following link:
System requirements for the Intel® Wireless Display