The catch is: code in a box only (if sold physically) as it’s not being sold as a disc nor cartridge. Vote with your wallet, is it worth funding Rockstar knowing they won’t ever release this as a physical game (digital only title)? Is the Ultimate Edition (in game stores are locked under a real pay-wall) a rip off if you’ve pre-ordered it being aware of what it offers in return of taking your money?
i see a ton of people irl get super excited for gta 6. personally, i’m not gonna play it (i don’t care about it + i don’t have any hardware that can run it + fuck rockstar), but i think it’s guaranteed that it will sell well. what remains to be seen is if it will make back its budget, i think it likely will but you never know.