The Wall Street Journal is reporting that Hewlett-Packard is working on touch-oriented devices, and will even roll out a touchscreen consumer-oriented notebook later this year.
Keep in mind that while Tablet PCs might have touchscreens, not all touchscreens are used in a Tablet PC form factor (or even the “convertible” form factor). This will look like a normal laptop and will not be a convertible like the HP Pavilion tx2500z.