Manufacturers have the needs of employers. In addition, they need to move physical goods in and out of factories and to distributors anad customers. The SkyTran car is big enough to carry parts and even finished products for many light industries "Just In Time": shipping just one car of material efficiently and economically to a destination. This improves responsiveness and quality in well-known ways.
Because SkyTran's guideway is narrow and the cars are small, they might be routed directly onto the factory floor from a vendor dozens of miles away, or on to a customer hundreds of miles away without the labor and waste of packing and unpacking. A Skytran car could come into the begininng of an assembly line and be "unloaded" right onto the product being made. A car once emptied can now proceed to the end the of assembly line and take each fininshed product (or a number of them) to their next factory, warehouse or even retail shop.
With this mechanism the velocity of "just in time" manufacturing can dramantically increase. Cost savings in warehousing can be achieved, but probably more important is a reduction in time-to-market. By moving smaller items in this way, the road network will be less congested for trucks necessary to carry larger items, allowing them decreased transit times as well. Everybody wins.