Will the virtualisation feature of Windows 8, be compatible with VMware images? Will I able use my
.vmx images or
.vmdk hard disks there?
(boldness edited in by me, typos copied)
As Hortinstein pointed out, I bet there will be a community tool to convert the images.
This is pure speculation (...anything about Windows 8 is likely to be at this point) but Microsoft always seems to favor the use of its own propietary document formats. You may be able to convert an image over with a community tool or VMware may include an option to export as a Windows image, but I find it very unlikely that the two competitors have much to gain by making their images play nicely with each other.
There is no true standard for Virtual Media, and unless something changes drastically, I still think there will be various camps for VMware, Paralells, VirtualBox, and Microsoft's offering.