Standard voltage doesn't mean desktop.
The standard voltage parts are what you find in mainstream laptops - think 13.3"+ stuff, not gaming laptops.
In other words, these are still Arrandale, not Lynnfield or Clarkdale. (Nor are they Clarksfield, the quad-core mobile part based on Lynnfield.)
Even gaming laptops, nowadays I'd expect Clarksfield over Lynnfield or Clarkdale, except for the most insane stuff - AFAIK, the only laptop with a desktop i7 chip is the Clevo D900F, with a Bloomfield. Even Clevo's 18.4" stuff that and the Alienware M17x use mobile CPUs. (So, you get to choose between a 2.0 GHz quad-core and SLI, or a 3.33 GHz quad-core and no SLI. And, the 3.33 box could possibly go for Gulftown when it comes out, giving it six cores.)