>>Is available in Google Chromecast.
>>
>>Cables are not bad IMO: anything on air is easier spied upon. I have no opinion on bad side effects of more radiation on human bodies, but the benefit of loosing cables is not that big, so for me cables if possible ;-)
>
>Is this what you are referring to:
>
>http://www.amazon.ca/Google-Chromecast-Streaming-Player-Compatible/dp/B00IT92PR0/ref=sr_1_1/191-3414417-6318551?ie=UTF8&qid=1444925177&sr=8-1&keywords=chromecast+hdmi
>
>If yes, does that mean it is something we have to plug on the tablet and another secondary device would need to be plugged as well on the monitor?

Only plug in into HDMI port plus power for the device through USB cable - either from the TV / monitor or any USB hub or charger.

>
>If yes, I was initially looking for wireless but I think this technology does not exist yet. However, I would definitely look at trying that one first.##

Should be ok for android devices from current middle class (think Motorola G and similar) but am not too sure if Kitkat will give you all options or if you need Lollipop or higher. So for android tablets this should be the device with most money behind updates.

Uncertain if you can stream all screen output from windows devices with special Chrmecast backgroud app or only special apps like Chrome.