Interesting, good video review I must say. I was kind of wondering would this be like the HSN ACER W500 10.1" sold for more over the past Easter Weekend for $599.99, but that had ran Windows 7 HP at 32-bit on AMD C-50 x64 x2 Dual Core 1.6GHz with SoC (system-on-chip) ATI GPU on the die, 2GB DDR3, 32GB SSD and all the video that was played on ran smooth. It uses ACER Ring Touch Screen Overlay that crashes. They had offered the dock keyboard, but that one had two prongs sticking up and with male USB connector and those tend to break off if handle not carefully.
ACER W500 Shown above
As for A500 graphic wise the Tera2 going to be released with Tera2 3D, later Quad Tera 3 3D it's own GPU higher speed for the Video side.
It seems that A500 is using the first gen of the Tera2 and not using the newer Tera2 3D @ 1.2GHz shown above in the tablet. There is a Quad core coming soon. Although the Android DEV Coders has the Xoom Tera running at 1.5GHz OC (over clocked).
I see by the video the tablet can't handle true 1080p video. My prior eLocity A7 with Tera2 was tad slow in video performance at times, but not always. It had played a 1080p video video without any issues, no jitter, no shuttering like I see in this video by Lisa.