Looks like no more Arcade games, no more proper distribution of homebrewed games.... And the price of remaining GDROM inventory will most likely sky rocket.
The article includes an address in which you can mail Sega of Japan urging them to continue production of the GD-ROM discs which will officially keep the DC alive.If GD-ROM production is discontinued, this means:
* No more NAOMI arcade games.
* No more NAOMI ports to Dreamcast (Recent NAOMI ports include Under Defeat and Radirgy).
* Trigger Heart Exelica (February 2007) and Karous (March 2007) will unexpectedly be the final official Dreamcast games.
* The NAOMI 2 will no longer be supported.
* The Chihiro arcade board will no longer be supported.
* GD-ROM capabilities of the Triforce arcade board will no longer be supported.