Two-in-ones -- also known as convertible laptops -- continue to grow in popularity, and PC makers are meeting the demand with a growing number of models at different specs, sizes and prices. Premium models offer the best functionality in the lightest, smallest bodies and with powerful battery life to get you through a Washington DC Escorts long flight or a full day of work. You just have to be willing to pay for it, with prices typically starting around $1,000. However, the feature gap between these and mainstream two-in-ones from Dell, HP, Lenovo and others is now much smaller, with some starting at less than $500.