For netflix it's up to netflix to push out an app for this feature. I have yet to see the DVD player not play the captions but for netflix that's another ball game. There is no federal mandate or law so it's not a sure thing.
I recently purchased a Sony DVP-SR510H CD/DVD player and just discovered that it won't display closed captions. Most of the time this isn't a problem because most DVDs that I rent are subtitled. I am hard of hearing and must have one or the other for most things that I watch.
For example, my recent Netflix rental "Gormenghast" is closed captioned, but not subtitled. The closed captions will display using Windows Media Player, but not my DVD player.
Can anyone recommend a DVD player that will display both?