Well, the reselling "debate" always comes up at any big release, and personally, I've never been a fan of doing it. The reason I don't like it is because the people that resell the item are just being leeches. They could
not buy the item, and the person that ends up having to go to eBay/Craigslist could have purchased it at MSRP instead. The reseller provides absolutely no benefit to the customer or the video game "ecosystem."
Now, I've sold things for more than their inherent worth in the past, but it's never been as a reseller. For example, I sold a copy of Xenoblade Chronicles for more than it cost me. The game was opened, but it's just the circumstances around the game's poor release handling in North America (only sold at Gamestop) and Nintendo's incessant region locking of their consoles (can't import it) made the North American copies worth more. I also sold an old 80GB semi-backwards-compatible PS3 for around $180. I paid $250 for it brand new ($600 - $250 cash back from Sony card - $100 price drop a week later). I'd argue that's certainly more than it's normally worth given it came with the bare minimum (controller + cables).
EDIT:
I doubt it, but maybe Sony will surprise me and make enough to capture most of the early adopters. I know they claim to have limited pre orders to get people looking in stores, but that limit still leads me to believe there won't be enough for the holidays.
Didn't Amazon recently raise their day-one allotment for both consoles? That's probably a good sign since, as you mentioned, Sony did state that they want PS4s to be on the store shelves. So, if they're still sticking to that, that means they probably have a rather healthy stock.