Was John C. Dvorak right about The Two-Step Virus Lurking?

I'm doing some research on John C. Dvorak's past predictions. Was he right to worry, in 2002 about a "Two-Step Virus Attack"

Claim:
http://www.pcmag.com/article2/0,1895,31765,00.asp

RE: KLEZ

"The creators of this software, I believe, are testing the waters for complex two-step viral attacks in the future. These attacks could be in the form of a binary virus—one that combines two seemingly harmless strands into something horribly corrupting."

"Although the antivirus companies shift attention from one virus to another, I harp on Klez for the sheer number of times it has come to me. It's in a league of its own this way, and attention must be paid. I sense something big is coming."

That was about four years ago. Was he right to worry?