Microsoft wishes publishers would use Smart Delivery to for cross-generation upgrades to Xbox Series X. However, even if they don’t Microsoft doesn’t want studios to charge for them.
One of the exciting new launch features of the Xbox Series X is Smart Delivery. This will allow players to buy a game once and play it across both Xbox One and Xbox Series X at no additional charge. So far, it’s been a given that Microsoft-produced titles will support Smart Delivery, and the technology is open for other publishers to use as well. There’s no obligation to use it to publish on Xbox, but Microsoft is encouraging companies not to charge for Xbox Series X upgrades, even if they decide to offer their own upgrade program instead of using Smart Delivery, according to VGC.