I saw Coldplay in Bangkok last night and was reminded of this thread. First concert I've been to in Asia and I had a great time! U2 are certainly missing a trick by not playing over here.
A few things that stood out were:
1) Stadium was packed with a fantastic diverse crowd from all over SE Asia and China
2) Fans knew all their new songs just as much and possibly more than their old hit songs
3) Need to work on the logistics and safety as it took a long time to get out of the stadium (I was in GA) and there were no T-shirts at all left at the end of the concert, not one!
Hopefully U2 get round to playing in this region as I'd love to see them over this way. Great weather most of the year and also gets dark quite early in the evening which is much better for an outdoor show.