The sales tax is more because of Amazon type purchases where so many are tax free. And on-line gambling, if you are a winner, your income on your 1099-G would be taxable on state tax returns, so yes, while it's 'not legal' in Nebraska, you would still be taxed on it. Regardless Ricketts is dumb.
Yes, they will...but I think you will also see a lot of Bar/Books...this is just a guess but I think big college towns will "get out in front of this" and the bars there will attack this head on with parlay cards and line wagers with a max bet, 10 or 20 dollars, something like that.