I will bet 1000vg$ on the fact salnax is right
Interviews with excutives and Tech staff.
Being describe as revolutionary
Announcement big enough for 60th anniversary.
Dreamcast mini would not satisfy any of those prerequisites. SEGA genesis is more important than Dreamcast to SEGA and it got a regular announcement. This announcement seems like something that issuggested it will shock the industry (not just a consumer).