finally got the PowerSupport clear screen protector just now.. all I can say is worthy RM90 spent.
Replaced it with my cheap temporary screen protector and could see the difference immediately. It looked just like the original screen and the clarity is amazing

Retina display definitely won't be wasted here
The salesman showed me his anti-glare SP and I felt that its being wasted on his iphone 4. I still think it's better to go for the clear one