This is the fall winter 2011 womenswear collection I'm asuming Sarah Burton designed these things and Alexander McQueen may have overseen them. These are things that will be readily available in stores

This dress below is designed by McQueen himself from the fall winter 2010 runway and is available probably at his boutiqes and other stores that have a clinetile that prefer the runway looks.

I hope that explained what I think the situation was...
Any who I'm glad that Sarah burton was appoited the creative director because she has been under McQueen's wings for 16 years and she knows the design asthetic and also has the abilities to create comercial wares as well so she could turn the house into a viable fashion house. i wish her all the best.
UPDATE:
just read Cathy Horyns blog and she said that Burton is responsible for translating the runway clothes into more average looks for the comsumer...oh well then I'm really super duper behind this
Story from Vogue UK
http://www.vogue.co.uk/news/daily/100527-sarah-burton-is-named-new-creative-.aspx
Photo's from TFS