It means a programming language that is better designed and works better than most of today's programming languages, to start. Think better than C and Golang, simpler than Python.

It also means a compiler. A language with better toolchain and better development experience.

It doesn't mean an IDE, at this stage. An IDE might be as much work as the language. Although integrating with an IDE can improve the debugging experience.

What would your dream programming language look like?