While the article is interesting (and accurate) it really should not come as too much of a surprise to us, since the acknowledged guitar gods are only one facet of the overall of what we've really been in decline with and that is rock or pop musicians who are talented with their (physical) lead or rhythm instruments in general.
The lure, after all, of making music by computer is not that it's 'just as good as guitar', it's really the implied promise that you don't Have to spend all those years learning how to play Really well.
But, based on all that has musically come of it so far, I'd say that maybe the computer is still proving to be the most difficult musical instrument to learn yet. ;>)