Market Research Shows Apple has 91% Share of $1,000 computer market

The Business Insider reports that Apple has a 91% share of the $1,000-plus computer market, Betanews reports, citing market research firm NPD. Mac sales, measured by revenue, are shrinking, but Apple's market share of $1,000-plus computer sales is up from 88% in May 2009 and 66% in Q1 '08.The average selling price of all PCs in the U.S was $701 in June 2009. For Windows PCs it was $515. The average selling price of a Mac was $1,400.
So how is Apple doing so well, as a luxury brand, within this economic climate?
As market research professionals, we'd like to hear your thoughts.