Well, I watch a lot of Big 12 football. Geno Smith worries me as a guy who is physically gifted, but makes stupid mistakes that could really hurt a team. He's a slightly more mobile Brandon Weeden. Not that I think that's a terrible thing or anything, I love Weeds. I just know that he was good for 2-3 'WTF' throws every game, and in the NFL that's killer. Geno smith has the physical tools to start right away, but not the mental tools in my opinion. he'll get easily confused and overwhelmed by NFL defenses and will turn the ball over a lot. WV had a great ofense that relied on speedy receivers and Tavon Austin owning everyone on defense. He won't have that in the NFL, he'll have to be able to read defenses and throw into tight windows and i just don't think he's ready to be able to do that yet.
He'll be taken in round 1 because of the position he plays, and eventually, given the right circumstances will make a decent starter in the NFL, but I don't think he has elite potential.