Agreed.
Imagine a true return to form of Sonic (That isn't done by Fans just given permission to make a game.), Shining Force (In the writing and art style of Camelot, what we have now is a travesty.), Skies of Arcadia, Jet Set Radio (Which they may or may not be doing something with as we speak given the random shirt in the recent No More Heroes game.), Phantasy Star (Both Fantasy and Online.), Yakuza on other consoles, NiGHTS, Crazy Taxi, Samba De Amigo, Space Channel 5, Like so many IPs I'm forgetting on top of those.
All they gotta do i remake and port a bunch of them, And if that does well enough another Dreamcast might even be viable.
A good way to test this is to also make a Saturn and Dreamcast Mini as well.