The Dreamcast was a really cool console with a lot of innovative features as Internet modem with Internetbrowser, Visual Memory with Mini Games and so on.
It had impressive games, which were unmatched at that time (even if they got converted later on). Whoever played Soul Calibur, Virtua Tennis or Shenmue at launchdate knows what I am talking about. Not to forget pearls like seaman, the fishing games (with fishing rod) and samba de amigo.
Also it was the first console with a wide homebrew scene. You can get emulators for nearly all the 8 and 16 bit consoles on the Dreamcast. You can play the old Lucas Arts Adventures via scumm and it is even capable of emulating the PS1 (some titles).
So yes, in my opinion the Dreamcast was the best console of that time. But of course it doesn´t stand a chance against todays generation or even the old Xbox.