I think this one is a BIG "IF". The kid is still in Single A ball! Heck, a guy on our local minor league Single A team (also named Bryce) is outhitting Harper right now, and they're in the same league. But I agree, we need these prospects to keep people buying new packs. A Pujols card from his 10th year won't have them emptying the displays at Target. I've bought a fair number of the new Bowman packs this year as well.
However, I bought a Bryce Harper signed ball when I first heard about him last year. And I think it only cost me $30. Now would be a good time to flip it.
Harper's team is playing our local team soon, so I guess I should take a sharpie and some cards to the ballpark!