In Time Quotes (page 190)
When Edward Gibbon was writing about the fall of the Roman Empire in the late 18th century, he could argue that transportation hadn't changed since ancient times. An imperial messenger on the Roman roads could get from Rome to London even faster in A.D. 100 than in 1750. But by 1850, and even more obviously today, all of that has changed.
Walter Russell Mead
If a product's future is unlikely to be remarkable - if you can't imagine a future in which people are once again fascinated by your product - it's time to realize that the game has changed. Instead of investing in a dying product, take profits and reinvest them in building something new.
Seth Godin