Yes buddy, still majority of people have SD connection and ARPU is quite low so operators have to cater to their needs as well as look for niche audience demands. Problem is that 4K requires huge investment and it is not financially viable bcoz of uncertainty in what one would earn.
In age of internet, ott now operators have hybrid boxes thru which one can access 4k or all other content online. 4K chs were a non starter and slowly u will see even regular sd, hd chs shutting down bcoz of online access. DTH or Cable Operators will have reinvent to b profitable as tv audience will mainly consist of older regular audience which will not b willing to pay more. Adopting HEVC for sd, hd chs is costly as it requires upgradation of hardware and other things, customers won't b ready to pay to change box