Android TV box/stick to stream from laptop

Hello,

I'm new here so please pardon my 'newbiness' .

I've been searching around for an affordable tv box/stick that would enable me to:
1. Stream my laptop's desktop on my Smart TV. My idea is to use a wireless keyboard and mouse and do some work on my laptop, but sitting on the couch and looking my Smart TV.

2. Stream my xbmc from my laptop in HD quality to my Smart TV. I would love to stream Movies and TV series from my laptop's XBMC to my Smart Tv in HD quality without any lap or errors.

Is this doable with a TV stick or TV box that is affordable?

Thank you for your time and looking forward to your replays.

Kind Regards,
Luka