Not sure what he/she means, but I would define "ideal" as a relationship that is able to sustain the mutual feeling that each is getting a good deal out of the relationship.
Instead, relationships often seem like they cut the "getting" count so thin that it's a constant struggle, OR one (or both) are actually cheating the other person altogether and one (or both) is suffering loss just to be in the relationship. After a few years, relationships seem to devolve and they just stop investing in each other like before when they were competing for each other's hearts.
To the question, yeah, I think such an ideal is possible in these times. In fact, I think it is even MORE likely in these times because illusions are much more easily destroyed by the empowerment of knowledge. It's easier now more-so than ever to have a strong basis to your perception of the world. Two people have more information at their hands to make good decisions about how to build what they want and what is reasonable to expect.
Personally, that's one of my main criteria when I'm checking out a gal. Is she reasonable? Does she look at the bright side of things? What is her definition of success? I ask myself if this gal seems like someone who I could sustain her feeling of "winning" by our being together.