> It's also significantly more responsive than any libvirt framebuffer.
I was pretty bullish on SPICE last year, with hardware acceleration enabled it was great. Not game streaming software latencies, but the seamless host-guest VM integration and usb/smart card redirection where features that I really desired for my workflows.
FreeRDP has supported this for over 10 years as a client. I don't know about non-windows servers: https://files.catbox.moe/roso8c.png
It's also significantly more responsive than any libvirt framebuffer.