Malaysia got rich, in large part thank to their Chinese minority, but the Malays have also become more Islamized over time (they were never as relaxed as their Javenese neighbors to begin with) and they will play the race card as well as the "Islam-in-danger" card very freely. I would predict more trouble, except that the Malays also seem to have a functioning "Hard-British-Raj" administrative system, so they may be able to keep a lid on things for a few more years. Plus overseas Chinese communities tend to be docile and not make trouble, especially if they can keep making money.
But as they say, it's a matter of time.