I honestly believe the Store Window, whether the Scrolling Gallery or one of the other flavors like the new Wall, has benefit. However, I also believe it's what you are selling and how you are selling it that makes it useful.
If you have promotions and discounts (like shipping) with combined sales, it's certainly an "eye candy" method to get a buyer interested to buy more. Certain nitches, like clothing and accessories sales, obviously have that potential.
Buyers want bargains or wouldn't be at eBay. Bargains in the new paradigm of fixed price are more likely obtained in the promotion and discount ties with sales. The SG use to help by showing other items ending soon for Auction sales and getting a bidder to move to the next items (possibly same). With auctions burried and the site operation a mismatch to that format, the gallery is better pointed to what else you have to BUY with the item under interest. That's why discount and promotions (to me) make sense.
Danno
