Just got a text message from argos saying:
Good news - Your pre-order for ****** for item is on its way. dpd uk will deliver as early as the official release date to track your order...
Hmm seems a bit early to get a message like that
It likely means they've been "scanned out" and are sitting on a pallet or in a trailer. Saves them having to process them all on the day they actually start moving.