The its dead line is a fan boy catch phrase.
So Intel is going to have new hardware in 2011 ? If that hardware appeals to you, you upgrade ? You sell your m/b~cpu, just like you would, just your cpu. Most people upgrade both together.
For AMD was 790 dead, when they introduced 890 ? I've heard the Bulldozer might not be all AM3, but 890XX AM3, its not here yet , who knows ?
Last time I checked if you want a new chipset, you buy a new m/b, even with AMD ,lol