Just brilliant isn't it?
You bought your lovely new i# system, or were saving up for one, and BOOM, there's Intel, ready to ditch you and beg for more money.
The practically new sockets are being replaced by the 1155, and 2011 sockets - codename Sandy Bridge.
I know, really taking the mick... Hit the read on for more info.
So the LGA1156 get's replaced by a socket with 1 less pin. Yup, "one". Are they compatible? I hear you scream, shaking the sides of your monitor, linked to the integrated GPU on your i5 system.
Nope.
The broke compatibility, for one measly pin. Maybe they realised that actually, it did nothing. So they took it out, and to cover themselves said - "Hey! It's new! Buy it!"
The LGA1366 is getting replaced by what must be a whopping great huge socket, with 2,011 pins. Have fun trying to get that on an mATX board, EVGA. I think E-ATX might really become more widely adopted if the LGA2011 socket takes off. mATX will become what are currently those mini-little-ITX boards, ATX will become the small but well packed mATX we have today, and E-ATX will be the full fledged ATX we have right now.
They just need to invent a new massive standard, for having two LGA2011 CPU's on.
That's it for now ;)