The Shield costs $199 as of today and it would seem that this price point isn't going to change because NVidia noticed a spike of interest in the device after the price was lowered, I don't think that budget devices will be able to match that hardware with a superior price point anytime soon and even if they will, they'll still require an additional input method (with a few exceptions like the Chinese gaming tablets, but those are usually poor quality gadgets), making the Shield the superior choice either way. I hated on the Shield big time when it came out, but that's because they charged an arm and a leg for it and getting a phone and an external controller was just more cost-effective. Now that it's affordable it's a perfectly viable Android solution, definitely superior to something you'd immediately cover with fingerprints or something underpowered. Hell, I see it as better than the OUYA which is admittedly far cheaper but it's a "home micro console" and that disqualifies it in terms of portability which is what you want from mobile-grade games (then again, it's not a huge achievement to be better than the OUYA... ;O; ).
The biggest problem I can honestly see with the Shield, games that require you to use the system in portrait mode. Not many games force you to use your system like that but if you like puzzle games and some of the cool tower defense ones. You run into them from time to time.
I imagine that the games run fine like that and can even be played, I just can't imagine it being a fun experience? (If a Shield owner has tried them and it's only my imagination that this would be a pain in the ass, please please correct me!)
Edit: Sort of on that subject let me throw in my recommendation for an awesome Tower Defense game with Zombies!!! (Warning will force you to use your system in portrait mode.) I have completed the whole game and it is great, considering starting it over again just because it's that fun, and it's free!
https://play.google.com/store/apps/details?id=com.artofbytes.gravedefence.hd.free&hl=en











