They write that DP uses packets, but it's still an isochronous connection with guaranteed BW allocation. For video timings with high pixel clocks, the bandwidt

They write that DP uses packets, but it's still an isochronous connection with guaranteed BW allocation. For video timings with high pixel clocks, the bandwidth used to transfer a signal is very close to what's theoretically available. There's no way you'd be able to do that reliably over something like an Ethernet cable. There's nothing sinister about how video standards are designed. From DP1.0 to DP1.4, which spans more than 10 years, all changes have been incremental and most just a matter increasing data rates while the coding method stayed the same. They need a system that's very high and guaranteed bandwidth, high utilization, very low bit error rate, and cheap. Even today, a 10Gbps Ethernet card will set you back $90. And that will carry less than half the data that can be transported by DP 1.4 which is old school by now.