I tried shield streaming .... I was not impressed. before you go and splurge out for another card go check on youtube and look for compatibility with your games.
Its basically a remote desktop done badly for what I used.
I am finding after years and years of only having Nvidia cards, I am propbably going to make my next purchase a AMD card .... Got fed up of being screwed over by driver updates :( on a 660Ti 3GB and my frames have dropped from solid 60 to average of 40 with spikes as far down as 25 :( same game no changes except drivers (needed to update them to play another game)