"BeOS, has added two important pieces that no other OS appears to use. First, BeOS uses the MIME typing system. This defines super- and subtypes of files, as well as provides a mechanism for industry-wide definitions."
I have tested BeOS and have made a few notes about how it stacks up to other OS's.
1.BeOS is a lot faster than any Windows OS.
2.Not much support for usb converted cable internet lines.
3. extremely active development
4.Once you get use to the navigation of BeOS it is pretty EZ to do stuff after.
I asume that after a year or two of active development BeOS will be very compatible and will be used as a replacement for Windows and Mac!!!