[brewdad]

Yes the design of the Sphere means it will never be a successful venue for touring acts. Any entertainer performing there will have to be committed to at least a month of shows, probably more.

That said, it's a unique concert experience even setting the visuals aside. The sound is immersive, coming from all around you rather than the wall of sound typical of most concerts. As such, while still plenty loud, your ears are not completely destroyed by the end of the night should you forget your hearing protection.