The new stadium for Real Madrid uses artificial light, and other features, to maintain a natural grass pitch, but it’s apparently a very intricate process and incorporated into the design of the stadium that is beyond anything that could currently be achieved with the Dome. The problem is combining the surface and necessary technology, while maintaining the multipurpose functionality of the venue.
I’ve posted a short video before of the technology used in their stadium and it really is fascinating.
Here’s an article that explains what went into the design and maintenance of the grass surface.