Just so you guys know, the GTX 470 is listed as HDMI 1.4a compliant.
http://www.newegg.com/Product/Product.aspx?Item=N82E16814130550
I'm actually planning on buying the 470 with a new motherboard and ram. ATM i'm stuck with a DDR2 (mixed speeds) motherboard and a 5770. So this should help...