Who would have "thunk" it?
US PC Market Share:
From Ars technica:
http://arstechnica.com/news.ars/post/20071018-dell-staunches-the-market-share-bleeding-while-apple-sees-big-growth.html
Of course, Apple has over twice the market cap of Dell and continues to grow PC market share at a quickening pace.
Apple is somewhere on the fulcrum of this tipping point now, IMHO.
Best,
Kurt