There's a few things going on here that I think are going to have serious influence on the next 10 years.
First, the 9X kids, as I mentioned before, want what the rest of the world already has. They've had a taste and I don't think they are willing to concede.
Second, a lot of Viet Kieu (Vietnamese from abroad) are returning and they have a lot of money. They're going to also want to maintain some semblance of what they've grown accustomed to in Canada, US and Australia. If there is anything I've learned from living here, money can buy almost everything.
The rest of SE Asia is growing at a faster rate. Vietnam is only really beating Indonesia.
I think what most people don't get is that communism here doesn't mean what you probably think it does. Capitalism is huge here and it's only going to get bigger. So, one or the other is going to have to give.
Finally, this decree is kind of toothless. They have neither the money or the knowledge on implementing it. Their idea of blocking facebook was (Facebook is generally available anywhere now) to block some DNS entries.