The "service" model works very well for multiplayer oriented games. Even if you pay 60€ for them, they still have a service component (servers, community, updates...) and they'll still die when the community dies (or the publisher shuts down the servers). Forget about preservation for multiplayer games, it just can't happen. And I'll certainly prefer a free TF2 to a 60€ (+DLCs) CoD. Much better model, much more value for my money.
For single player games, it's much harder to implement without devolving into microtransaction hell, but I'm not worried. Games like Skyrim, The Last of Us, Heavy Rain were successful without any kind of multiplayer. GTAV made 1 billion in 3 days and everyone is playing the single player now. LoL being big doesn't mean your story driven games are going to die.
For single player games, it's much harder to implement without devolving into microtransaction hell, but I'm not worried. Games like Skyrim, The Last of Us, Heavy Rain were successful without any kind of multiplayer. GTAV made 1 billion in 3 days and everyone is playing the single player now. LoL being big doesn't mean your story driven games are going to die.