Anti-aliasing will be done at the whole display or rendering window level, not at the entity level.
The TVC when implemented on a PC graphics board does not have to stand on its own in the rich environment of the PC ecosystem. The AMD fusion components, a future Intel ~100 core x86 based GPU, or even a NVIDIA GPU used in a GPGPU role could interchangeably provide computational and rendering support to an open graphics based PC. Given the continued explosion of CPU power provided by the 'core wars', it may be possible and/or desired to keep many functions currently accelerated by the graphics card like HD video decompression on the CPU(s). As the PC is an evolving platform, the specifications of the TVC must adapt to leverage and enhance it. In short, the specifications of an open graphics card should adapt to provide the best user experience with the minimum amount of custom hardware.
An alternate (and perhaps more exciting) vision for the TVC as a hardware core is to use it as a component in an FPGA based single board computer that is powerful enough to use as a stand alone PC. The success of the netbooks is evidence enough that raw computing power does not dictate the user utility or market viability of a computer, particularly considering that a virtually infinite supply of computing power is always as close as the nearest Ethernet jack.