If one of the use-cases for utilizing the TV screen is for tracking the portfolio or doing light trading in a different Zerodha account (like your family or relatives account (for added reference, also check this thread)), then the Smart TV’s internal web browser might also do the trick. I tested this on my own LG Smart TV’s in-built web browser app and things seem to have worked (aka I was able to log in and charting was also functional) -
But you are correct in saying that this method will not work if one wants to login into the same account from both the devices (TV and laptop) due to concurrent login being not permitted.