Music Room vs. Home Theater Design Question?

I am in the process of remodeling my Music/HT Room. This room is approximately 12.5'x 20'x 8'.

Here is what I do not understand.

In nearly every Home Theater I have ever been in or have seen pictures of on the Internet, they have carpet for the flooring.

However for nearly every Music listening room I have ever been in or have seen pictures of on the Internet, they have hardwood for the flooring. I have also noticed the hardwood flooring trend for recording studios.

Why do you think this pattern exists?

Acoustics? Budget? etc.

Thanks,

Josh