The way I see it,
As long as Hyundai brand releases very cheap cars such as Accent, they are not going to be huge in luxury segment.
We all know how important brands are in the minds of today's consumer. It's enough to say you own a BMW, Lexus or a MB without naming the model for people to understand your status. If you say you drive a Hyundai, as far as everybody is concerned, it could just as well be an Accent. The brand, in my opinion, just might not be recognized as a 'status' brand. If they come up with a luxury brand, it will be a whole different story.
Like the VW Phaeton. An excellent car, to my liking, much like the Audi A8, but.....it's a Volkswagen. Last time I heard Phaetons didn't sell too well.