I'm talking with somebody and they're pretty sure Sony had a big release the day the Dreamcast launched. I've checked around a bit, but I haven't found anything.
I do see that the PS2 hype machine was in full swing at that date, though.
Another interesting tidbit: Bernie Stolar left SoA three weeks before the DC launch...just as he had left Sony three weeks before the American PSX launch. From that article:
My personal theory is that the DC's failure within three years had nothing to do with Stolar or anything internal - I think people were wary of Sega after the Sega CD and 32x, and looking forward to the backwards-compatible PS2 at the time."Bernie has done a fine job positioning the product," Leibowitz said, "orchestrating a media blitz that has resulted in a sell-out before it hits the shelves."