There's is absolutely nothing that Cursor has that anyone else can't easily and doesn't already. In fact better. Open-source solutions already outpace Cursor.
The difference is open-source doesn't exactly have a giant marketing budget. So most people haven't caught on yet, but they will.
Who is better for that tab completion?
I think they bought it for SuperMaven.
but Gemini is perfect for tab completion, and the price for Gemini will be always lower