To be sure if your system is or not compatible with the Intel® Wireless Display you must check with Dell* if they provide it as a feature of the laptop you are getting.
The Intel® Wireless Display must be enabled and set by the computer manufacturer, setting this up in a system that was not validated might lead to very unstable behavior and/or it might not work at all.
The minimum requirements for the Intel® Wireless Display are available in the Intel website, at:
Intel® Wireless Display - System requirements for the Intel® Wireless Display
Thank you for your reply.
I have been onto Dell customer services on several occasions,each time I could not get an answer to this question,all I hear is that if it has two graphics cards and Optimus installed it should be WiDi ready,that is not good enough for me if I purchase the required adaptor and it does not work.