So...what I'm getting at is one of these:
1. MTB is infant and will one day be inverted
2. Moto will one day realize that they can drops some more weight by mimicking the MTB forks
3. The factors are way to great. That is a line that probably can't be crossed with the two sports.
I'm kinda leaning toward #3 in that the weight savings will be negligible to change Moto, and it's TOO IMPORTANT to neglect for MTB's, therefore "it is what it is" and it's gonna stay that way.