This is what I found after an internet search:
- http://www.partnerinfo.lenovo.com/partners/uk/products/thinkpad-yoga.shtml Datasheet: http://www.lenovo.com/shop/emea/content/pdf/ThinkPad/Convertibles/TPYOGADSEN.pdf
- This one meets the requirements if sold with an Intel® wireless adapter: http://www.dell.com/uk/business/p/latitude-e7440-ultrabook/pd
- I have XPS 15 9530 (switchable/dual graphics) next to me: http://www.dell.com/uk/p/xps-15-9530/pd
System manufacturers may change the specifications at any time; therefore, I suggest you making sure the system meets all Intel® WiDi requirements before purchasing.
You can also search for other members' compatible systems in Intel® WiDi Communities.