I just learned about this program in Portland (now Seattle and Boulder too) and I think it is the neatest thing ever. Portland debuted (and now for the second year running, showcases) the disaster response capabilities of cargo bikes and their rides to move assets to where they're needed. Bikes can maneuver into areas inaccessible by car and avoid the problem of gas rationing. We saw intrepid New Yorkers spontaneously up and put bikes to good use during Hurricane Sandy to move much needed supplies into damaged areas. So, the concept isn't completely out-there.
With climate change, declining natural resources and changing human migration patterns, we're only going to be faced with more natural and man-made disasters. It stands to reason that just as we're sloooowly diversifying our transportation options (including investing in diverse infrastructure, MUPs, etc.), we need to adapt how we respond to disasters. In areas with a network of MUPs, I can see this sort of trial being worthwhile. I just can't get over how creative this deployment of bikes is.