Ultraviolet has no chance. The quality of the download is poor, and the restrictions on use of the movies are too annoying.
Streaming from Netflix or similar services is simpler, and faster. So Ultraviolet fails the convenience test.
And if someone wants a high quality copy they can use on any device, they can pick up a cheap used disk of the majority of films and rip and covert themselves. With a modern decryption program and the free conversion programs like Handbrake, this is so simple anyone can do it. New releases are the only problem, and I'm afraid many employ the rent & rip strategy with them.