Steam has apparently made a little change to its shopping cart page in the form of a new message that very clearly lays out to one and all that you're not buying a game—you're buying a license.
I say the message is "apparently" new because I can't swear it hasn't been there for days, weeks, or maybe even months already. But it's definitely there now, and was only noticed by the internet at large within the past 24 hours. Given the absence of scathing "you fool, you absolute buffoon" messages on Reddit, though, I strongly suspect it is indeed new.
