Hi there,
Godot 3.0 has just been released after 18 months of development!
Check the official website for the lengthy but feature-packed announcement: https://godotengine.org/article/godot-3-0-released
The Steam version will be updated in coming days, and will offer both 2.1.4 (like now) and 3.0, with an option to select what version to start. This should allow you to start porting projects to Godot 3.0 without losing the option to run your existing projects in 2.1.4.
Stay tuned!