Some of the report's findings might be moot because the physical memory (DRAM) market has seen price falls lately that favor high-powered virtualization environments. In November, memory market researchers DRAMeXchange reported that improvements in yields via new technology combined with falling consumer demand meant that DRAM prices have dropped significantly. It quoted the example of a 2GB DDR3 module that started this year priced at $46.50, but which can be had for just $20 now.
Additionally, an industry report by Deutsche Bank suggests that memory prices are unlikely to rise again until the second half of 2011. In fact, the report says, they may fall even lower in the short term.
In other words, there's never been a better time to invest in efficient virtualization computing, but beware that the DRAM market tends to go up and down like a yo-yo, so this time next year it might be a difficult story.
Keir Thomas has been writing about computing since the last century, and more recently has written several best-selling books. You can learn more about him at http://keirthomas.com and his Twitter feed is @keirthomas.