10 Gb/s is not all that much for cameras. Enough for one 60 Hz 4k 14-bit depth camera transmitting raw bayer data.
60 Hz * 3840 * 2160 * 14bit is 6.96 Gbps.
60 Hz * 3840 * 2160 * 14bit is 6.96 Gbps.
What you'll actually be sending is a high bitrate mpeg stream, probably 54Mbps or thereabouts, you could probably fit 50x camera streams on a shared 10Gbps bus.