One can now easily connect an IPAD to a monitor or projector without wires with less than $150 in equipment (Apple T.V. and router). Some projectors (and monitors) also now offer built-in wireless connections.
 
http://www.lawtechnologytoday.org/2013/02/quick-tip-showing-powerpoint-presentations-on-the-ipad-part-2/

Microsoft offers a wireless adapter that works well with Surface Book and Surface Pro Products.

https://www.microsoft.com/accessories/en-us/products/adapters/wireless-display-adapter-2/p3q-00001
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