Once KA starts offering courses that are at university level, perhaps. But as it stands the level of the topics covered on KA is far to superficial to threaten universities. That's not to say it won't happen, but so far I've seen no indication of it.
PS. With all that being said, I'm huge fan of KA, and rooting for their continued success. I just think they're better suited to take on high schools rather than universities.
I believe hé meant superficial in the way that the courses don't go into the deep end of the subject the way a university course might (which is absolutely ok, as it is not aimed at students at that level, but at the same time it means that it cannot replace a real university).
PS. With all that being said, I'm huge fan of KA, and rooting for their continued success. I just think they're better suited to take on high schools rather than universities.