I think not having tv is a great step.
For me personally. DS has HORRIBLE behavior on video days. And we follow a rule of "one day a week we watch videos" (thomas, bob the b, etc). My philosophy on the once a week deal is that limiting per day set us up for a constant struggle, whereas, once a week, he can get to a point where, it's been a few shows, and DH and I will up and pull out something - legos, fabric, whatever, and start playing with it. Not suggesting it, just playing between us two. Eventually he might wander over and abandon the video. My thoughts are that he's experiencing first hand that there's something more fun to do that watch videos.
For the record we do not have a TV. We watch on our laptop, from DVDs or websites. IMO, again, but having the big black focal point in the room adds a lot to the "just turn it on" mentality. I don't advertise to be media free (yes we watch bob the b, and sesame street, etc), but watching videos on a laptop, which I can make disappear really easily, is far preferable than having that screen fixture anchoring the living room together. I truly feel that I give up very little by not having a TV, since we have the laptop w/ DVD and high speed internet.
ETA: I love not having a tv for purely decor related reasons as well. I love that my living room doesn't have to be set up around a screen. Also, when I have people over, they comment on how calm the atmosphere is, etc. At first they are surprised we have no TV, but then, the comment on how nice it feels not to have the big black box stare at you, even when it's off. It's so HAL 9000, you know?
If you don't have cable and you do DVDs anyway, I would kick it to the curb. You don't need it to do what you already do. And you can camoflage the triggers better with out it.