You should not plug a TV into an outlet controlled by a switch as this
will cause damage to the electronic components over time. Many modern
components require time to shut down properly. While they all are
built to survive sudden loss of power, doing this over and over may
cause damage. The TV on/off switch will power the TV on/off more
gracefully, and protect the components, giving your TV a much longer
lifespan. As far as remembering channels, most TV's should be able to
do that regardless.

As everyone else here mentioned, your bottom outlet is just a regular
outlet, and you can plug anything into it.