That's not quite accurate anymore - there's an open-source OpenGL ES driver for the Pi that isn't just a wrapper around the binary blob on the VPU. However, you still need the proprietary blob in order to boot the Pi and actually enable the display outputs, and for accelerated video decoding. (Oh, and it has an interesting license that forbids you from using it on non-Raspberry Pi hardware.) On the Allwinner chips, it's the other way around - you can boot them, enable the display outputs and do modesetting and I think even hardware video decoding with open-source code, but OpenGL ES requires a proprietary blob. Though I think the Allwinner 2D graphics overlay hardware is fully documented, which may be enough for some applications.
>> Oh, and it has an interesting license that forbids you from using it on non-Raspberry Pi hardware.
Does that mean you can't use the Pi as a dev board for the SoC and then build a product based on that? Or I suppose you'd license the video driver when you go to buy the SoC for production?
It does, but chances are Broadcom won't sell you the SoC either so it matters less than you think. I expect it's mostly just aimed at anyone who attempts to re-purpose existing hardware based on the same Broadcom SoC.
