To touch on what Colin said about digital versus physical, he is definitely right about how in gaming, we tend to act like we are impervious to the change all other forms of entertainment have seen.
I used to be so adamant to not want digital. Then Steam came around, and over the past 10+ years, it conditioned me to accept it. The convenience was very much appealing. The games install so fast off the disc in mere seconds which is also nice. Steam has a nice back-up option, but I do not see that ever coming to consoles due to piracy and having to include a writeable drive. I am wanting to now lean towards digital in consoles, because it is nice to hot swap into another game on the fly. Only issue I have is the sales/deals and for now storage.
Example, I just did in-store pickup for when I got out of work for Shadow Warrior on the PS4. They had in on clearance for $8.99 ($7.19 with GCU, lol). I also have Amazon sending me Alien Isolation for $15. So when I see that, it is hard to pass up physical still, and I also like to own physical versions of their core First Party Franchises or instant classics as a 'collector's' thing. I do not sell games anymore, just as Colin said. I have not sold games in almost 20 years.
They (the online stores, PSN/XBLive) are definitely getting better every year with sales, and storage is a slight concern (have yet to upgrade HDD, because I may wait and get the new UC4 PS4 and do it then). Fingers crossed for PS4 to adopt USB HDD gaming.