For years the specialist press has talked about security issues but now we're really seeing the impact thanks to Petya. The lessons learned from this are hopefully ones everyone already knows (patching) but I still see people who are apathetic around this topic - it's not rocket science people, accept that patches are a fact of life and plan for them, not hope you don't get caught out.

Rock Paper Shotgun totally stole one of my ideas (I'll let them off with it) with Curated Stores: I think there's a great opportunity for some custom front ends with specialisms in Steam but I also think there are challenges with any such approach (discover-ability and making them sustainable (e.g. pay the bills)).