Virtualization can be a big help with DR.
If you can tolerate a little out of hours downtime, it's easy to keep up to date copies of virtual disks, which can be trivially restored to any server that runs your hypervisor of choice. That gives you considerable hardware independence, as well as an easier restore process.
If you can't tolerate downtime, VMs on shared storage can be snapshotted and copied. Not as easy, but you still get a much easier and faster recovery process than running on the metal.
Also, if you've virtualized and have a disaster wiping out your server estate, you've got far fewer machines to replace, saving time acquiring/commisioning them.,