Well you don't need to reject it, but... It would seem to me that to go for a completely different setup than what is proven to work, it should offer substantial advantages. I have yet to see any, not even one that was at all substantial and I see lots of disadvantages.

Even the belt goes as far as they say that is still the same as or less than I am routinely getting on a chain, NOT twice as long.

What are the pluses:
1. Not life of the belt. That sounds like about a wash to me
2. Not repairability. If it breaks you need to have a spare.
3. Silence. Maybe, but so what if you are going to use a noisy Rohloff.
4. Efficiency. Not even in their own tests.
5. Cool factor. Maybe if that floats your boat.
6. Not cost, especially if you have to go to a Rohloff, which would seem to be the only way to get a reasonable range of gears.
7. Not the ability to pick and choose ratios it seems to come in only one.
8. Not availability of spare parts. There is only one source at this point.
9. Not ease of fitting it to an existing frame. You pretty much have to go to some weird frame or go custom at this point in time.

Did I miss any?

Roll your eyes all you want, but at this point in time there appears to be very little reason to go with this technology.