Well it's been 20 years since the Dreamcast was released in America on the fabled 9-9-99. Though its life was short, its impact was large. The Dreamcast brought a number of innovations to the table, most notably bringing online gaming to the forefront of the console space, even including a humble 56k modem built into the device.
Sega was at their absolute creative peak during this era, releasing fresh, original experiences one after another. Games like ChuChu Rocket, Crazy Taxi, Jet Set Radio, REZ, Samba de Amigo, Seaman, Shenmue, Space Channel 5, and more, all had their own unique identities and were unlike anything else on the market -- even to this day in many cases.
Let's not forget the third parties, either. Capcom went absolutely ham on that thing, bringing over a huge number of their arcade hits, including some home favorites like Resident Evil and Dino Crisis. The Dreamcast also tended to house the best versions of multiplat titles released during the PSX/N64 generation with stuff like Tony Hawk, Soul Reaver, Rayman 2, et cetera. On top of that, it's still receiving physical homebrew releases to this day. That's some hardcore dedication.
Though it's been said millions of times, the Dreamcast truly does have an incredible library, especially considering it only had a shelf life of around two years. Though its life was unfortuately cut short, as the old quote goes... "it's better to burn out than to fade away."
Happy 20th, Dreamcast.