That this band was featured in a retrospective at the Museum of Modern Art in New York, entitled "Kraftwerk 1 2 3 4 5 6 7 8" is evidence of its relevance and function in contemporary culture. Their significant experimentation in sound looping is present today in hip-hop sampling; their narrow focus on technology and unwavering belief in the role of electronics -- since all the way back to 1970 -- was prescient and uncanny considering how addicted to electronics our society has become; their willful mix of digital art, synthesized melodies, and staged events was deserving of last year's historic retrospective of their body of work. Their retrospective is currently (8 Feb '13) midway through its engagement at the Tate Modern in London. Yes. They are extremely influential, and if you have yet to hear them, wait no longer.
Kraftwerk, though a bit dated and missing any kind of a recent hit, still has what it takes to be a functioning pop group. The truth is, the standard to be considered functional is pretty low these days. As long as the group is still together and putting out music of some sort, they are functioning.
If Kraftwerk was still a functioning group I would have at least heard of them somehow. They may have been popular in the past but the past is the past. Kraftwerk is obviously past their prime and beyond the point of functioning at this current moment. When was the last time that Kraftwerk was relevant?
Kraftwerk is a pop group that had its time to shine. Unfortunately, that time was many years ago. I am willing to bet that the majority of listeners to pop music these days do not even know who Kraftwerk is, nor could they name when their last hit was. Kraftwerk is old and busted.