Hasewell and Broadwell will move into LGA1150 instead.
Honestly speaking, reusing the same socket is not future proof. When it comes to upgrade new CPU, chances are you need a new motherboard as well. Otherwise you are buying CPU from the same generation, not newer generation.
One of the reason I criticize Bulldozer and upcoming Steamroller is reusing AM3 socket. That's like forcing new design into old layout, not good at all. If AMD wants HSA (letting GPU taking over FP from CPU) to be successful, they need to ditch AM3 platform so they can use PCIe 3.0 to serve the interconnection between CPU and GPU for GPGPU/FP tasks. Otherwise HSA will be using much slower HyperTransport, which is pretty much dead (HyperTransport is also the reason why none of the AM3 motherboard supports PCIe 3.0).
Intel did reuse LGA775 at one point, remember Pentium 4 and Core 2? Problem is even using the same socket chipset itself aren't compatible with each other. Eg. Core 2 motherboard cannot use Pentium 4, vice versa. So what's the point?
