Which governments? How many governments? It looks like a strong prediction but it's actually made of weasels.
Any sovereign government or subsection thereof. I don't think we need to worry about whether Sealand or Vatican City banning bitcoins counts. And how many? He says governments, as in, more than 1. This prediction is no less precise than the vast majority on preditionbook.com, most of which can be closed fairly uncontroversially without debating what the meaning of 'is' is.
Tangential, but a subject of some local interest:
Why Bitcoin will fail by Avery Pennarun. "The sky isn't red." Thesis:
I'm not sure I buy these and am not competent to evaluate his claims on 3., but would like others' critique.
L019: Bitcoin P2P Currency: The Most Dangerous Project We've Ever Seen by Jason Calacanis. A rather more enthusiastic viewpoint of the project:
The actual text contains many more caveats than the eye-catching selection of points above.