It (Blu-ray) has already been more rapidly accepted format than the DVD format it replaced.
Apple's dumb, IMHO, if they
don't jump on this trend, even though it will eventually be replaced with a more superior invention at a later time.
Think of it this way: If CD-ROMs weren't embraced by the computer world (just because it would someday get replaced), we'd still be saving our data on floppy disk (and you don't see those anymore in new computers). And if CDs weren't embraced as the bridge from records/cassettes to MP3, we wouldn't have gotten the convenience CD-player... which, computer-wise was turned-CD-ROM drive.
It's a building block to the next level.