A new long-form blog post is coming soon, but in the meantime read Tim Arnall's fantastic argument against invisible interfaces.
Invisible design leads us towards the horrors of Reality Clippy. Does my refrigerator light really go off? Why was my car unlocked this morning? How did my phone go silent all of a sudden? Without highly legible systems for managing and understanding all of this ‘smartness’ we are going to get very lost and highly frustrated. The tricky business of push notifications and the Facebook privacy train wreck is just the tip of the iceberg.