"In the 1980s, there were SCO Unix computers everywhere. In the late 1980s, everyone moved to Novell servers from SCO Unix. In the mid-1990s, Novell was out in favor of Windows servers and now the trend is toward a Linux model. Novell abandoned its NetWare software in favor of Linux and Microsoft is also making progress in the Linux realm.
This is one trend I foresee sticking around for more than just 5 years or so. Linux is still growing and becoming--yet to reach its true destiny although I think that cloud computing is close."