Let me correct a misunderstanding: I have the 85/1.8-G and the 85/1.4 AF-D. What I meant to convey above was that I am less impressed with the 50/1.8 G than I am with its longer family member, the 85/1.8 AF-S G, which is an amazingly sharp, light, and easy-to-use lens that has astounding optics for the price. It is very sharp, very crisp, a very high-resolution lens.
The 85/1.8-G is an amazingly good 85mm lens. It's sharper and higher in contrast and more even in illumination than the 85/1.4 AF-D, which is still however, a gorgeous portraiture lens, with softer edges, a lot of light fall-off, and a very sharp center image area, and really smooooth, creamy bokeh. The new 1.8 G is much "harder", more sterile, more of the new Nikkor look. I've seen the images from its faster partner, the 1.4-G...the two are fairly close. Neither one is "worlds apart" from its contemporary sibling. I saw very little reason (none) to buy an 85/1.4-G when I own what I think is a better beauty lens in the old Cream Machine, the 1.4 AF-D, which is one-third of Nikon's 85-105-135 AF-D trio of lenses designed to create three-dimensionality, rather than to score into the stratosphere on resolution charts, which the new 1.8 and 1.,4 models were clearly designed to do.
With the 50/1.8 G, I've noticed that at wider apertures, the corners/edges are NOT that good on 24MP FX. Take a look...this is typical for it at f/2.5 and f/2.8...with LR sharpening at 52 and a 1-pixel radius...meh...some 100% screen caps with that setting AND the LR 50/1.8 G lens correction profile enabled.