Doubtful.
The dismissal of people preferring a physical copy is quite frightening in my opinion.
Lets hope Steam never goes bankrupt, nes pas?
I'm only commenting based on what its player numbers tell me.
Dismissing those people makes sense in Skyrim's case because it's a Steamworks game. Most people buying it would know beforehand that Steam was required, and therefore consider that when buying the game. This undoubtedly would've lead to a large number of them, possibly well over 50%, buying digitally.
It wouldn't be such a big factor if Steam wasn't required for activation, but since it was, you have to consider that when looking at just how many people DID buy the game, and how few bought physical PC copies by comparison.