I rather disagree with a logical progression shamus has made - That is, people who play farmville are likely to make the next step and begin to play other games.
This is simply not the case with zynga games. They are too disconnected from video games in general. The only reason they play zynga games is because it is on facebook, as well as because it is ridiculously easy, yet draws you in to play multiple times due to it's rpg elements.
I don't see my mother (who plays farmville) moving on to play any other video game any time soon.
Since she played farmville, she never once has showed the slightest interest in any video game. nor do I think she ever will. She hasn't learnt anything from farmville in terms of gaming. As the only aspect to it that is at all common to games is the sense of continual improvement through menial actions. Which frankly every human knows through other avenues.
The interface is used via mouse only, the game tells you what to do. It is basic - even for a casual game - and makes no efforts to teach you any new skills. If you know how to move a mouse, read, and click, that's all you need. In terms of "gaming skills", there are none. No strategy outside of very, very basic strategising for highest xp/money. And that's only people who are power levelling.
It doesn't help gaming, it doesn't ease people into gaming. People don't even view it as a video game, it's viewed as a part of facebook, and the social gaming that goes with it.
Perhaps this is just me seeing with one eye closed, but I see no positive benefits coming from zynga to the video game market, outside of silly web 2.0 trash makers.
If the article was about popcap and armor games on the other hand - Fair enough.
Edit - Well after reading the article a third time, I wonder how I started ranting about something so far from what shamus was saying.
Well I guess he's right, although I'm still not sure whether or not it's possible to get lots of "uninitiated players" playing video games in any way except spoon feeding. It still takes some form of computer literacy to play plants vs zombies. I'm not sure whether there are any lessons to be learned from zynga, other than the popular mass tends to go for simplicity over quality, whether it's music, video games or films.