Ive been streaming lots of games online and offline with this little box and its quite amazing you need to set your router to 5ghz or keep both PC and Shield wired to the router for best results.

After playing for a week and tweaking all the settings. (My Laptop i7 has Nvidia 960m GTX GPU)

Single player games work really well in HQ Street fighter X Tekken was amazing! Watchdogs was Playable.
Some low demanding games online work (Titan Fall was OK and Playable in HQ)
COD, Battlefield 4, Hardline played online in HQ and that was poor to say the least.

Ill try these games on lower setting online to see the results but TBH i only want to play in HQ or there is no point for me.