I agree on the Stones.
Not to sure who you are refering to as 'real bands' around 2001 though, my memory of music around then is of a fairly grim time of either English Bed-wetters (travis, Coldplay etc) or American garbage (Papa Roach, Korn etc), whether you think 'is this it' was the second coming, or whether the strokes were just trendies pushed by suits is irrelevant, after the Strokes the focus was shifted in a whole new direction, see the pandemonium that The White Stripes were greeted with by all sections of the British media (remember theywere on their third album then but only broke after the Strokes), following Is This It there was a massive influx of new bands, some good some garbage, from all parts of the globe, therefore changed music.
You musn't associate change with good, in my opinion Nirvana changed music though there success spawned some pretty dismal bands, that doesn't meen they didn't change Music.