As long as your tv has a analogue tuner it will work. However, it has been suggested that once switchover is complete, manufacturers may drop the analogue tuner from new models, in order to save costs as it is no longer required.
So after switchover, when buying a new TV make sure it has a analogue tuner, if you want the magic eye to work.
This is assuming by magic eye, you mean the watching the same channel in another room functionality, as the remote control function will work reguardless of analog tuner.