A bit of friendly feedback. I can always tell the author of an article is Chris when there are a lot of opinions in an article without much evidence. "This sucks or this is better than that" type of opinions without much to back them up.
So onto this article, Ultraviolet sucks because Veronica Mars fans have trouble? The Apps are buggy yet that's the end of the statement with no actual evidence to back up the assertion? You even go so far as to recommend Apple or Amazon as alternatives yet those are also DRM laden and lock you into a single service - how is that better?
I signed up for Vudu on my Roku 3, I have ten free movies to try out UV. I then signed up for Flixster and got a free movie. Right there in each account, Vudu on my Roku (and hence big screen) are all 11 movies. I can sign into my Android device and see them all (although actually PLAYING them on Android is limited to unrooted devices, which mine is not.), I can see them on Flixster. I imagine I could see them in Target app if I so chose and CinemaNow as well or any other UV clients that come along each trying to get me to buy or rent movies through their own service.
I do have an awful Amazon app on the Roku but that's the only place you can watch the movies you buy there (I don't count the web browser and downloading their software on the PC as I want big screen here.) iTunes has NO such big screen equivalent unless you own an AppleTV.
I even redeemed a digital copy of one of my kids DVD's, "Planes" but I chose to have that go to Google Play instead of Vudu or the other choices. That movie does NOT show up in the UV catalog so I think there are still options to get non-UV digital copies - at least from Disney. I could use the Chromecast anywhere to play that for the kids - but still locked into one service and way of playing the copy on the big screen.
So, from my actual experience, Ultraviolet seems to work just fine. However, none of the digital movie services are perfect. I still prefer to rip all my own media (music and movies) so I can watch or listen to them where I want, whatever quality I want on whatever device I want. Nothing can beat the DIY experience yet.