I might note before you read further, you might consider me biased (I don't think so) as my sister, after a long career with HP, works for Memjet Home & Office. Additionally, I spent over 9 years ('96 - '05) in the Tektronix/Xerox Phaser printer organization.
According to the Memjet website:
The technology will be available in products in 2009, starting with a 100mm printhead that will be used for Retail photo printing as well as Label printing devices. An A4/Letter printhead will be available by the first half 2009 with many variations of components and technology improvements planned for the future.The companies that pickup this technology are going to take giant leaps in front of their competition, as speed has always been an issue for color printing. Memjet promises great color quality with 1600 x 1600 dpi in a single pass, allowing for 60 pages per minute.
You cannot buy inkjet printers at this speed today. For a very nice Xerox color printer, using solid ink, you can expect to pay $700 for half the throughput speed. Not a price for home printers. Spend nearly $1100 and you can get color laser at 42 ppm. Xerox doesn't even offer a color printer this fast in the office market at any price. Checkout HP, you cannot find a color laser at this speed, either. The highest priced (office) color laser prints at only 40 ppm, and a lower resolution of 1200 x 600 dpi, all for $4200. One final comparison, the top rated HP, the Deskjet D2530 Printer has a maximum speed of only 16 ppm.
This promises to be even a great jump in the inkjet market than Kodak's price slash for ink cartridges. Be on the lookout to see what manufacture releases the Memjet technology first.