Mede8er.eu are driving it. The fact is chips for the last three years have offered little. The chinese hardware subcontractors have used them because they needed product, dumped their products into the market. OEM's like Sanji don't have to keep them employed to build rubbish. If they can't find a chip worth using, and profitable, they will just wait.
4K is being driven by VOD. Not everyone will get all the 4k VOD services by their 4K Smart TV. They will need an external Google TV box to do it.