IIRC there were rumors that the headset would have an open PCIe slot for such things to be added. Presumably they were passed on as defaults for cost reasons.
> The Frame’s four outward-facing monochrome cameras and IR illuminator seem to provide excellent tracking, though in a brief demo, the black-and-white passthrough view wasn’t useful for much except getting a general idea of my surroundings. Rowe says sticking with monochrome passthrough was an intentional choice because color passthrough would have added to the Frame’s price. “The core focus of the device is the gaming,” Rowe says.
> For those who want color passthrough and other changes to the headset, Valve has made its headset modular, including a dedicated expansion port in the nose piece designed to support extra cameras. The expansion port offers 2.5Gbps of bandwidth via MIPI and one lane of PCIe data.
> The Frame’s four outward-facing monochrome cameras and IR illuminator seem to provide excellent tracking, though in a brief demo, the black-and-white passthrough view wasn’t useful for much except getting a general idea of my surroundings. Rowe says sticking with monochrome passthrough was an intentional choice because color passthrough would have added to the Frame’s price. “The core focus of the device is the gaming,” Rowe says.
> For those who want color passthrough and other changes to the headset, Valve has made its headset modular, including a dedicated expansion port in the nose piece designed to support extra cameras. The expansion port offers 2.5Gbps of bandwidth via MIPI and one lane of PCIe data.