Hyper-V Planning: SLAT Concerns

I am currently planning on testing Windows Server's Hyper-V on my server.  My server comes a CPU that does not include SLAT support.  I read on the Internet that Hyper-V on CPUs without SLAT will suffer from graphical performance degradation.  However, I have a few questions in mind, and would hope to receive assistance here.

1. Is the problem severe, first of all?
2. Articles on the Internet seem to focus on graphical performance on the host, will the guest (i.e. the virtual machine) also suffer from graphical issues?
3. If I do not perform graphical intensive work on the host, will the problem still exist?
4. If I test the server in a headless mode, using it as a File Server + Hyper-V Server, will the problem still exist?

Thanks a lot^^

P.S. I am aware that there are work arounds, including but not limited to using the VGA driver, but I would like do that only under the worst possible scenario