CDPR will most surely have contractual obligations with many big retailers(like amazon/gamestop) who haven't broken street date who will be pissed if people start cancelling their pre-orders from them and started playing by buying the game digitally.Ah well like I said I pre-ordered the game digitally through PS4 and I also have on PC. I pre-loaded the game on both, but in all honesty though. Considering this has happen and the game is finished the smart thing to be fair is to release the game early. There is no real reason to keep it on hold honestly from what I see.
Anyways, this whole thread is about this topic. I suggest you read through it if you need more information.