I don't think we'll see alot of high school kids make a jump to the NFL ... it's just to physically demanding and they aren't ready. I think the impact may be kids leaving for the NFL after 1 or 2 years of playing college, instead of having to wait 3 years. Unlike basketball, I don't see this as a real big issue....
Good editorial on this topic in today's Washington Post: http://www.washingtonpost.com/wp-dyn/articles/A17170-2004Feb5.html The print version also shows pictures of several top underclassmen who might consider turning pro as a result of this, including our very own Skyler Green.