We all have many things in our heads that we want to do but can never imagine doing them for real.
"What if I tell you that you can be as tall and handsome as you want to be and walk up to the most beautiful girl in the world, propose to her, and become her boyfriend. Sounds 'impossible'?"
Suppose you are an introvert and can't express yourself in office meetings.
As a result, despite your extensive knowledge and intelligence, you can't impress the boss because you do not put your ideas forward in the office meeting.
The reason for your reserved demeanour could be your short stature or a weak voice, or a general lack of social affinity.
The way you would perform in such a virtual meeting would be much better than in a real-life meeting.
Now, imagine an office meeting where you can choose your avatar (persona) and your voice.