This question is too generic to be sure what you are really asking about.
- The Pi4 has a GPU.
- its a newer GPU core than the ones used in earlier Pi models.
- Some graphics API support has been upgraded to newer versions and some has been removed.
- Same for Video Codecs supported in GPU, we now have both x264 and x265 support but lost MPEG2 and VC1.
Does Raspberry PI 4 support the accelerated graphics?
As per the specs, the Raspberry Pi 4B includes a VideoCore VI GPU, so yes.
Now as far as OS support I do not know what the current state of play is.
RPi = The best ARM based RISC OS computer around
More than 95% of posts made from RISC OS on RPi 1B/1B+ computers. Most of the rest from RISC OS on RPi 2B/3B/3B+ computers
What I'm really wondering if it support Windows 10 IOT remote deskop? The previous models of Raspberry PI didn't support Windows 10 IOT remote desktop.