As prices fall, more people will be prepared to give e-readers a try, though, if music players are any guide, prices will have to fall below $100 to make e-readers a mass-market proposition.
Reinventing E-mail may be a daunting proposition, but reinventing just one E-mail service - Gmail - would be a great start.
改造电子邮件可能是一个令人生畏的议题，但是对一个电邮服务——Gmail进行改造会是个很好的开始。
3
Joyus thinks its value proposition is combining e-commerce with high-end video and social, but pretty much anyone could do that (including other e-commerce companies).