By now, we pretty much know where your mind is going with this, and we would tell your mind to knock it off. The introduction of such a high-profile device the most anticipated smartphone of the year is probably going to be accomplished through a more public and worldwide stage than a window at a Phones4u store. The last major event that Samsung held in London was to display both the Samsung GALAXY Nexus and the Samsung GALAXY Note, and that was at the Battersea Power Station which is more notable than a retail store. Figure that this presentation would be worthy of a low to mid-range handset.
Phones4u had no comment, which is the smart thing to say because it keeps everyone focused on the display, guessing. By next Friday, we will know for sure.
source: Eurodroid via AndroidCentral