You can do it with some external tools.
You first convert your Powerpoint slideshow to a video file then burn
it to a dvd with a dvd burner.
For the PowerPoint to video conversion tool,. you can have a look at
PPT2DVD
http://www.sameshow.com/powerpoint-to-dvd.html
With it, you can convert a Powerpoint slideshow to MPEG and then play
it onTV with a dvd player.
What sets this program from other similar ones is that , what you can
do with your slideshow on PC you can just do it with a controller on
TV. You can also create menus to make a comprehensive layout for your
presentation playback on TV
Make a comparision of the different programs in the market and find the
most suitable one.