whats so good about N-Gage?

www.seemobiles.tk
i just want to know what's so good about N-gage service? apparently nokia thinks it's the best type of gaming, but i cant see what n-gage has to offer against slightly old 3d phones such as nokia 6630, or sony ericsson w910i (which isn't even symbian).

do n-gage versions have better graphics or something?

can someone post some comparison screenshots?