Maybe only vmware can help:
Compared to PD8, VMware Fusion 5's Windows 7 and 8 retina support is not as well done. They didn't take the time to do the back-end theming work and instead opted for straight pixel doubling of the entire video buffer. The result is softer icons, text, and windows throughout.
http://arstechnica.com/features/2012/09/parallels-desktop-8-and-vmware-fusion-5-pro-review-showdown/
I'll send that to support as well.