Makes sense to me... The Jeff Hawkins video intro on this page (the "future" link) clearly indicates it won't just be for Palm mobile devices
With its 10-inch screen and full-size keyboard, the Palm Foleo mobile companion connects wirelessly with your smartphone to help you do more on the go. Unfold it, press a button, and it's on instantly—while just one touch brings your email to the big screen.1 Use your Foleo to view attachments, type longer emails, or to get a bigger look at web pages and photos you'd normally view on your smartphone.2 And with up to five hours of battery life packed into such a compact design, you'll do big things wherever you go.
Source: Palm, Inc. - Products - Foleo