To put it simply I learnt that there is a lot in development at Shopify they're continuously developing new features and they really encourage growth both for their business and their customers.
There was interesting talks on working with your partner from Underwater Pistol and some great insight into running a large agency from the guys at Smart Cookie.
These events are almost always worth going to to make connections with other Shopify partners as well as Shopify staff. I met some lovely ladies who were in everything from marketing to photography which are always handy connections!
If you ever get the chance to go to a Shopify event I recommend doing it form local meet ups to Unite, it's always worth it.