TL:DW Steam has now changed its language from buy game to A purchase of a digital product grants a licence to the product on steam. This may also be non compliant with the new regulation as it still uses the word purchase. Also GOG used this opportunity to let you know their games come with an installer that they cannot take away from you.
Like Kichae mentioned, every media we buy is technically a license. License to use. However we own the physical part of it and we can use (read, watch, play etc.) it whenever we please. Should be like this with games as well. At least GOG does this. As long as an installer is in our hard drives, it’s a physical media.