Boeing has a lot of untapped markets. It's one of the few companies which can do things which require scale and regulatory changes in aviation.

Technology is where autonomous flying cars, for example, are mostly constrained by regulatory and major capital.

Less ambitious would be things like sleeper planes for long haul red-eyes.

General aviation is a smaller industry, but also ripe for distribution by someone with capital and regulatory connections. It's stuck in 1970-era technology.

I can name dozen of other things Boeing could pull off, if lead by someone like Jobs -- someone with both vision and the ability to execute.