Paul Thurrott of WinSuperSite reviews Mac OS X 10.4 Tiger. He concludes (emphases mine):
The marketing that accompanies Tiger’s release is no different: Described by Apple as “a super-modern operating system” and “the newest major release of the world’s most advanced operating system,” Tiger will, in Apple’s words, “change the way you use a computer.” That, of course, is completely untrue. Mac OS X 10.4 “Tiger” is, in fact, a minor upgrade to an already well-designed and rock-solid operating system. It will not change the way you use your computer at all, and instead uses the exact same mouse and windows interface we’ve had since the first Mac debuted in 1984. That isn’t a complaint about Tiger, per se: It’s a high-quality release. My issue here is with marketing, not with reality.