There are a lot of benefits IMO owning a digital version, i buy all my games on steam but you can use any other service too and they work fine. Here are the benefits of getting a digital download:
1. Instant delivery, no need to check in with your local stores if your game has arrived and then go pick it up. With average download speeds of more then 20 Mbps it does'nt take more then couple hours to download any game.
2. Easy re-installation, just backup the downloaded setup on your hdd or external hdd and re-installation is FAR more faster then re-installing from those slow dvd media. Also backing up dual layer dvd's is pain and quite un-reliable.
3. No need to keep track of your dvd's and if you own lots of games then they also take a huge amout of shelf space.
4. No risk of getting your installation media damaged/lost because you can always redownload your electronically purchased games (atleast thats the case with steam).
5. No hassle of putting your dvd in rom before launching or searching for those no dvd cracks which can be infected (you never know). For offline games you can put your steam in offline mode after authenticating once online so no you don't need to have a constant internet connection to play your offline games.
6. Easy access to dlc's.
7. Automatic updates (steam only)
etc etc so why most ppl still prefer physical copies, explain your point please.
I personally only buy physical retail copies when i want to buy the collector's edition, other then that its 100% digital download unless the game is not available on steam which i have yet to encounter with any recent game.