I would much rather play a port/cross-buy of a good game than an exclusive mediocre budget title. Quality comes at a price more often than not.
Uhm... I think you forgot about a few relavant titles... Y'know, like... Quake? Or Doom? Or Duke Nukem 3D? Or every platformer made before Mario? Or Silent Hill? *sighs*
In any case, our "point" is that the smartphone that's likely already in your pocket is entirely capable of doing everything the Shield is capable of if not more, and as far as the controls are concerned...
This thing here is called a controller. It costs about $30, which is ten times less than the device you bought and it gives your smartphone all the controls you need.
The graphics won't differ whatsoever because an Android app is an Android app - the Shield ones will be the same ones available from TegraZone right now so any handset (which you are likely to already have unless you're a caveman with no phone) based on Tegra will play them exactly the same - any other handset will play them as well, with a few Tegra-specific tidbits missing. The controller doesn't hog your battery life because it has its own batteries. The Shield gives you no advantage in this scenario other than the advantage of having a lighter wallet.
