Unless Blu-Ray wipes the floor of both DVD and HD-DVD over the next 4 years (hint: so far, it isn't, DVD is still king), Nintendo will not put their games in BR format. That'd be like handing Sony a big, fat check every time they put out a new game, or worse, sell a console. It's poor business policy.
Which is why Nin's systems still don't do DVD. They don't want to waste money on DVD royalties. They may use a BR or HDDVD like disc a far as capacity goes, but, it will definately not play movies or have logos for any of these.