Should be ashamed of themselves. Some do upgrade. Some can upgrade. Some people just can't upgrade because their hardware is too old. They will want to buy new hardware unless someone dissuades them.
Some people can upgrade.
A lot of them will be looking at the Mac press for pointers on whether or not they should. The one result of this is that whatever your opinion on Mac OS X, Apple is committed to it. Mac OS X is happening. Mac OS X is favored by the industry. Mac OS X is favored by developers.