Quality means different things to different people. My X100S for instance is more than enough quality in terms of resolution. My Pentax 6x7 however beats it hands down for skin tones, "punch" and resolution of course, that's a given. The images have more depth, that's quality to me. I think skin shouldn't look like plastic, which digital does, somewhat. An image taken with my M4-P looks better than an X100S one, although I can come close with the Fuji with Lightroom. I keep a digital camera because of convenience. If I was to live off being a photographer again, I'd use digital. My film photographs always have something "extra" in terms of quality though. When I post an image from a 6x7 negative, I get more positive comments, even though people do not know which camera took the shot...
Digital is great for journalism. If you're not in a hurry, film is better IMHO. But that wasn't the original question, whas it? ;-)
They are definitely good enough. You can get a great image from a D2X at 12mp... Less from what I read here. Sony just released a 12mp camera, so... I think improvements will involve making digital photography look more natural. Which brings me to the fact that too much "quality" might be detrimental to an image at some point.. Especially if there is an excess of post-processing. A lot of the images I see on 500px make me want to puke.. Fortunately we don't see those here.
Gil.