Yeah its very eerie. Though sometimes its very close, like dangerously I feel, I tried once myself and the background was unrealistic (the prompt was me giving a keynote speech for a vision board ) but I looked like... me.
No, it can't do detail well, AFAIK the images are produced at a lower resolution and then upscaled. This might be specific to the ChatGPT version, however, for cost cutting.
Enhance headshots for putting on Linkedin.