Check this out.
This question prompted me to look more into the Samsung Optical Smarthub I wrote about on my website this week.
The smarthub doesn't actually let you transfer your movie over, however, it does enable you to watch DVDs directly on your iPad or other Apple/Android device.
As I mentioned in the review article, for a quick movie-watching session, it works well. When you actually get it to work, it does what it is supposed to do, but that is basically where it ends.
Pausing it for a fridge-run and then continuing when you get back is a hit and miss. Sometimes it continues, but other times, it freezes and you have to start from the beginning finding your position.
If you switch DVDs, it's best to reboot the drive, because the build-in buffer can cause some long waiting when you try and access the new DVD.
At the $40, I do think it is worth the price for what it does, but if you want to put your DVDs on a tablet of some sort, even picking up a used computer for $100 or so will be a lot more useful. Aside from being able to convert your movies with something like DVD Catalyst, so that you can transfer them over, you can also keep your video file collection on the computer drive for whenever you need them, and by copying the actual files over to your device, you don't need Wifi in order to watch the movie, which makes it a more portable experience.