Cool! I just went and looked at WP's list of Dreamcast games[0] and honestly, besides Ecco, Seaman and Shenmue there's nothing from Sega I want to play. I'm hoping they do as good a job at bringing third-parties along for the ride as the JP PSN did for PS1 games.
[0]https://en.wikipedia.org/wiki/List_of_Dreamcast_games