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.