MacBook Air fans aren’t hard to find. Although I admit to being a bit skeptical at its introduction, the laptop grew from an underpowered runt to an underappreciated workhorse over the years. But the design has hardly changed in the decade (!) since it came out — at least until today’s Apple event, when the company took the wraps off a totally redesigned Air with a retina display and Touch ID — and a new $1,199 price.