Socket 1366
Re: Future on consumer grade single socket 1366.
That's typical of Intel. Let's change the path again after 12mths. <end sarcasm>
I'm starting to get itchy feet myself, and am keeping an eye on high-end i7 stuff to replacing my aging dual-Opteron system (which is now 5yrs old, but still holds up well for the tasks I use it for, but my main concern is component failure now).
I was looking at Xeon 3500-series (mainly for ECC support since 12GB of RAM would be installed) on socket1366, but looking through the local distributors, I only see the Xeon 3520 being listed, otherwise it's 3400-series (socket 1156), where the 3400's are somewhat cheaper for the same clockspeed. 
Socket 1366 boards that support Xeon 3500 and RegECC that are workstation orientated are few and few between. (Intel has 1, Tyan has nothing, Supermicro has 1, Gigabyte has 1 and Asus has 1). ** While socket 1156 boards for Xeon are coming out quite fast, but look to be relegated to entry-level servers (due to PCIe slotsetup) and not workstations.
And most people are staying that the triple channel setup offers very little over a dual channel setup, and the benchmarks tend to agree...
For future proofing, even I would only consider socket 1156... (or go with AMD and AM3 based CPUs).
For the record, I am pricing an i7-8xx w/8GB RAM on a P55 board, 64GB SSD + 1TB HDD + BR/DVD combo to be a replacement, but due to recent revelations may not be financially viable and will opt for a netbook instead...
** In reference to support, I mean that the board is designed to run a Xeon and give you complete options with regards to ECC, while many socket 1366 desktop boards will take a 3500-series Xeon, ECC support is minimal or completely missing.