This has literally always been the case with Steam, the only difference is that people are told up front now. Things will likely continue to operate exactly the same as it has until now, I doubt Valve wants to disrupt the giant money train they have.
Steam's new disclaimer reminds everyone that you don't actually own your games, GOG moves in for the killshot: Its offline installers 'cannot be taken away from you' (www.pcgamer.com) angielski