As I said in the last article about the Shield, this thing doesn't have that much value in my opinion. Some rumors had suggested a price as high as $450, so $350 isn't too bad, but still too high in my opinion. What Android games are good enough to buy a $350 device? The main value of this thing is it's PC streaming functionality, if you have a powerful gaming PC that is too big or gaudy to put in a living room, you could buy one of these and stream your PC games to your TV. Or if you already have a small htpc you game on in your living room, and somebody else wants to watch tv, you could keep playing by streaming your games to the Shield's screen. But honestly, is it worth $350 just for that? I don't think it is. And if you have a 500 series or older Nvidia card or an AMD card, you need to pay extra for a new video card just to stream games to the Shield.
The PS4 will have similar functionality, allowing you to stream your PS4 games to the Vita. But the Vita is $250, not $350, and there has been talk of a discount to $200 when the PS4 launches, as well as a PS4/Vita bundle that saves you even more money.