Ok I tried that and rebooted.
I get all kinds of lines in X log that says FBDEV(0): mode "1440x900" not found. FBDEV(0): mode "1024x768" not found.
Funny thing is I set up a different CentOS 7 and Windows 10 guest - and they are scaling just fine and I get higher resolutions. Its just my CentOS 8 guest that is 800x600.
Thoughts?
Jerry