Yes, if there were no IP anyone could cheaply make a single-digit-nanometer-node custom ASIC to provide the alternative 4K-capable video hardware implementation. /s
Anyone? No, probably not. Some enterprising company in Shenzhen, who would sell the thing for $.25 a piece due to fierce competition driving prices down to cost of materials? Now that's more likely.
Single-digit-nanometer-node custom ASICs aren't really required to achieve this. Although there is higher latency this can and has been done on FPGAs at a company I worked for which designed and built custom AVOD systems for private jets and helicopters.