Can Guitar Hero rock on?

Gibson Guitar has sued the makers and distributors of the "wildly popular" Guitar Hero for patent infringement. More details here.

Gibson said the games, in which players use a guitar-shaped controller in time with notes on a television screen, violate a 1999 patent for technology to simulate a musical performance.

Will musicians/gamers have to resort back to DDR? Will "musicians" have to start using a guitar with actual strings? Will guitarists be forced to read sheet music? So many questions remain...