There's a new dotted line I spotted while using my Kindle the other day. It shows how many people have "highlighted" a certain passage. Perhaps it was a particularly inspirational passage, a nugget to talk about during book club or a clue in a murder mystery plot. Either way, this highlighted sentence has made reading more social. I now know that 83 people before me found a passage interesting and it gives me cause to rethink and reread.
That's the thing about going social. Acts that at one time were personal, made in a silo, have immediate context from people around the globe.