So someone figured out to get data from the Stern motherboard using Raspberry Pi. He's currently using the integration to auto tweet scores. I can see that this could be easily enhanced so that there is a REST interface to pull a whole bunch of data more than just scores and a web based console to control wifi and social media integration. https://pinside.com/pinball/forum/topic/auto-tweeting-high-scores
This means that you can have wifi... but it would be more like another entire computer that added RS232 chained to the stern motherboard.