I have that hope too, and it's difficult to not mix "this year vs. at some point" but, although it happens, I doubt Jackson will be a #1 WR this year. For this year, I'm sticking with what I saaid. But, yes, Jackson has an interesting upside.
In fact I wonder why he dropped and was supposedly only rising because of the weak WR year. He's fast with great hands and good size. He seems smart (based on the predraft stuff) and comes from a passing attack that Belichick claims is closer to a pro offense than most colleges. That leaves only the teachable things like crisp route running and using his speed on the field.