gopher1369 :
I play most of my games with a 360 controller! Currently playing Darksiders (thanks Humble Bundle). Deadly Premonition and Enslaved have just been released on Steam so they will be my next 2 games. I can't imagine using a KB and mouse for any of them. Does Shield work well for these kinds of games?
Yes, absolutely. If it's a game that uses a 360 controller, it's an ideal Shield candidate. In some cases there are still limitations, you may have to launch with your PC, but if you control it with a game controller exclusively, it's ideal.
Different strokes for different folks. Granted, my opinion is subjective, hence the word "personally" in my quote. Others may feel differently. But As a PC gamer who prefers a mouse/keyboard combo even for console ports, and only uses a gamepad for racing titles, I will always choose the PC for PC games, and mobile games for a mobile platform *when I'm at home*.
Should the day come when Nvidia has a cloud-streaming service that works over, say, an LTE connection from my smartphone... well, that'd be a different story altogether. If I'm out of the house, and I don't have direct access to my PC, I may appreciate the Shield's gamestream capabilities more.