Let's collect our best guesses and wishes for PDC announcements. I'll start with a few of mine:
1) We'll get a proper version of BigInteger in the core .NET framework.
2) Windows 7 will boot in less than 10 seconds out of BIOS.
3) Some sort of magic whereby traditional WinForms/WPF can be deployed and consumed in a sort of hybrid Silverlight / Virtual Machine setup so that the exact state of your app is shared among devices. Something beyond the typical Terminal Services approach.
4) Yet another programming language... functional, verbose... like F# for VB programmers.