Has baseball become an inferior good?

From John D. Burger and Stephen J.K. Walters:

World Series telecasts are now an inferior good. Income and the time cost of consumption interact so that a ten percent income increase reduces viewership by 1.8 million households. Increased availability of substitutes reduces ratings but increased drama improves them.

What does that say about the future of the sport?  About the future of television?

For the pointer I thank Kevin Lewis.