It would certainly make more sense to have it in Moon township near the airport. There is more open land, there is no need to cross the bridges, the facilities for warehouse and shipping are nearby (Fedex has a hub at PIT airport). There is enough free land area to build supplier locations next door to the main plant. The airport corridor (I376) is being rapidly expanded and has a lot of new business space. Housing is available and cheaper than the city. PIT airport has a major military installation (Air Refueling Wing) and is likely to gain another in the next round of base closing so it would make it convenient to work with military applications.
The main reason to have it in downtown Pittsburgh is to be near CMU. Perhaps CMU could consider opening a robotics extension campus in Moon. In Pittsburgh parking, storage, shipping, suppliers, and future growth would all be space constrained.