Im just going by this mate :
“If the consoles are not involved there is no Witcher 3 as it is, we can lay it out that simply. We just cannot afford it, because consoles allow us to go higher in terms of the possible or achievable sales; have a higher budget for the game, and invest it all into developing this huge, gigantic world.Developing only for the PC: yes, probably we could get more [in terms of graphics] as there would be nothing else – they would be so focused, like if we would develop only on Xbox One or PlayStation 4. But then we cannot afford such a game.”
And how is it that you read the words "Developing only for the PC" and arrive at the words "...and selling only physical copies"? Are digital downloads somehow not
PC games to you? He doesn't say anything about physical versus digital, he's talking about all sales on the PC as a platform.
Because of the decline in high street stores carrying physical copies of PC games, consoles provide the best chance of a high street presence as evidenced by the physical sales in POST 34, with PS4 dominating the physical sales.
Nobody knows (afaik) what the digital sales are either for PC or consoles via PSN or XBLIVe at this point.
From Post 34
PHYSICAL COPIES ONLY :
63 per cent of physical copies were sold on PlayStation 4,
32 per cent on Xbox One (unusual insofar as W2 was a 360 exclusive so it had history wit XBOX)
5 per cent on PC. Of course, the lion's share of PC sales will be digital (Chart-Track's data does not include download sales).