Currently, there's no support for x64 virtualization on Microsoft Client OS (ie Win7) so the only solutions are running your laptop on Windows Server 2008 or using some third party virtualization tools (like VirtualBox).
Running WS2008 on a laptop leads to some painful issues as it was never intended to run on a laptop as the host OS; like video drivers and missing hibernate/standby (If a had a dime every time I forgot to properly shutdown my laptop instead of just trying to hibernate... ;)
The good news is this article on the W8 Blog, about Hyper-V Support on Windows 8.
Basically, Hyper-V will be enabled on Windows 8 (it looks like with the standard tools currently) and standard client OS functions will still be available when enabled like hibernate and standby.
So, I can't wait switching my dev/demo laptop when W8 will be released.