The UMPC is a rather different product, priced at double the cost (or more). And with the UMPC hype/marketing, it should now be easier to bring some attention to 770. Also consider these facts and a follow up product should seem almost certain:

1. The 770 was sold out, apparently outperforming Nokia's expectations
2. Nokia launched a whole new platform with the 770. A bit too costly an endeavor for just a single product, you'd think?