Here’s some links from some research I did. Looks like the one thing from SQL Server Denali that we might actually want would be the increased functionality for reporting purposes.
This link will give you what’s new in Reporting Services in Denali and talks about how Crescent is Reporting Services’ new reporting tool, however here it also looks like there’s not really any changes in the CTP for SSRS specifically. In fact, here we see that there are no major enhancements for Reporting Services are included in Denali CTP1. It’s a little fuzzy to me what Project Crescent falls under, but there’s a cool demoof it that makes me think it might be worth waiting to upgrade to.