Pretty much all my thoughts I had from the thread title and initial post have been posted, but I have to agree with the people saying: no.
First and foremost, I do not think that there will be a large, nationwide (or international), announced, set date on which all Apple Stores will officially begin selling Watches- for which Apple could push their marketing to garner enough hype to create lines outside their stores. I think that store launches will be rather quiet- at least as they start up- where certain Watches will begin popping up in locations. And that this will then cause, by the time Apple 100% officially advertises that Watches are "In Stores Now," the demand to be tamed down to where lines won't be happening.
I also think that the only people that would be creating these lines, would be those who hadn't yet received a Watch they pre-ordered. And I do truly think that Apple will have fulfilled a VAST majority of the preorders, if not all, by the time most of the above paragraph starts happening. And (IMO obviously) the Watches that will start quietly popping up in stores will be those that have a heavy supply compared to demand. So, every single person that may still be waiting on a preorder really won't have any sort of argument as to why "they're pissed Watches are on store shelves before they received their preorder," because they could have placed an order WEEKS ago and received said Watch WEEKS ago, had they ordered one that was in less demand (and in this future scenario, available in Apple Stores).
I think that was a really long way of saying everything I wanted to say. But, to clarify- I 100% disagree with anyone "compromising" on the Watch they truly want just so they could get it RIGHT AWAY. So please don't take what I said above to mean that I think people should have done so in order to get a Watch quicker. It will totally be worth the wait once you have the Watch you had your heart set on, and I do think that most people who audibled so they could have their Watch NOW will regret it in the end. My main point there being, I do not think that anyone will walk into an Apple Store and walk out with a Space Grey Black Sports Band (for example) before almost every single preorder has been taken care of.