The employees will handle trade-ins and preorders, and be expected to sell "exclusive digital add-ons" as customers come in and pick up their games. Best Buy reportedly wants to push a "virtuous cycle," where customers preorder games, buy the DLC at the store, and then use trade-in credits for another preorder as the cycle starts up again.
The game sections in each store are also slated to increase in size, with the less-popular music departments taking the hit in most cases. Best Buy doesn't say if it plans to have free hot dogs for customers who come and buy games, but we're just throwing that out there, guys. Think about it.