That's not how patches work though.
1.x is the overall version number.
x.1 is the build number based on the patch.
Basically, 2.0 would be a brand new release of the game with a massive content change that affects the very basics of the game. (Example: GTA:San Andreas. When they re-released the game without the hot coffee content THAT was 2.0, a later version that prevented modding altogether was 3.0)
So next patch would be 1.10 because the base game itself won't be changing in any fundamental way.
I've seen some games have patches run up to 1.25.
Where Beth to release a patch that massively changed the leveling system or changed every single detail of the game, then that could conceivably be called 2.0 then.