If you went with 1156, which I did (P55 Classified + i7 860 @ 4.0 Ghz), then you're screwed, just earlier, since it's now Socket 1155, which isn't compatible even though it's just a 1 pin difference.
I wasn't very happy with Intel when I found this out, since they've recently switched sockets after holding on to 775 for so long, but from my understanding AMD has also done something with the AM-2/3 socket where some motherboards are back/forwards compatible, but others aren't. I think there is a derivative socket, Am-2/3+, that is backward compatible but the Am2-3 standard version isn't forwards compatible. Don't take my word on it though, my builds have been Intel since the Q6600 came out. AMD has done a better job of backward compatibility but the sweet spot for price/performance + overclocking has been Intel chips whenever I've done my last few builds, and I only do builds every few years, usually after new architectures are released so my motehrboards are usually replaced as well.
Anandtech covered upcoming socket changes in more detail in their writeup