Answer:
Massively so.
One of the most influential guitarists of all time. With Cream he transcended everything before and paved the way for a whole new foundation of rock music that directly lead to the types of Led Zeppelin and so many others.
He was also influential in the rennaisance of American blues as a core musical format and popularised reggae.
Still going strong today he is now legendary at 65.
He could hardly have impacted music more.