While current netbooks are already rapidly capturing the attention and credit cards of savvy travelers, the addition of multi-touch support in Windows 7 could be the spark that sets off a firestorm of netbook purchases later this year. The cost of adding capacitive touch-screen functionality to diminutive screens will be much less than with laptop and desktop monitors with their relatively large surfaces. The Touch feature set is only available with Windows 7 Home Premium and higher Windows editions, which adds to the overall cost; however people buy netbooks as much for portability as for price. People purchasing based on size and features and will be willing to spend the extra $100 or so for significantly improved usability.
More info: PC World