[citation][nom]caedenv[/nom]They tend to change the extreme chip pinouts with every generation, so buying a SB-E board will ONLY work with SB-E chips, the next generation of high end chips will likely be something different. On the low end, boards tend to last several generations. LGA 775 lasted forever (P4-C2D), and LGA 1155 looks like it will last a good long while as well, but they expect you to buy a whole new computer when you buy higher end equipment.[/citation]
The situation was quite a bit different with LGA775. That one socket served the entire lineup of Intel processors, from EE to Celeron. LGA775 wasn't targeted specifically at the "low end". The model Intel currently uses with two coexisting platforms only started with LGA1366 and LGA1155.
Your comment suggesting that Intel's mainstream platforms last longer also isn't necessarily true. LGA1156 for example was around for only about a year and a half, while LGA1366 which debuted in Q4 2008 is still in use today. You're suggestion that Intel expects you to buy a whole new computer to simply perform an upgrade on their high-end platforms also isn't true. LGA1366 saw a revised lineup of new processors on at least two occasions, the first being the D0 stepping, and the second being the 32nm 6-core lineup, giving people a very viable (if not prohibitively expensive) upgrade path on the same high-end platform.
[citation][nom]caedenv[/nom]IB will be a new architecture coming out Q1-2 (mar-may) of next year. As with all Intel releases this will be a 'tick' release, meaning the low to mid-range chips (like our current i3-i7 2600K chips), which will be followed up with a 'tock' release of the extreme and professional (like the SB-E chips the article is about) chips roughly a year later.[/citation]
The 'ticks' and 'tocks' in Intel's release schedule are completely unrelated to targeting low-end, and subsequently high-end markets. They are dependent on process shrinks and the release of new architectures. Tocks are new architectures, ticks are process shrinks. Sandy Bridge is the 'tock', Ivy Bridge is the 'tick', and Sandy Bridge-E is... well neither. It's simply a follow up to Sandy Bridge on the same process and using the same underlying architecture, only targeting the high-end market.