I want to get a G5 too, but you're missing the point. We're talking about which solutions are best for businesses, and unless every employee is doing things like video editing or genetic research, deploying G5s to every employee is probably not feasible.
For the average employee who need basic functionality like e-mail and web access, word processing, database access, etc., the eMac is an excellent, economical choice. If most employees are equipped with eMacs, the company's IT departments can be downsized and improve the bottom line.