This is a new version and the first non-"Innovator Edition" (read: enthusiasts/devs) - the big deal I think is that presumably as a true consumer product, it'll be getting a lot more distribution, and moving forward will probably a big part of Samsung's pitch for differentiation of their flagship mobile products.
More resolution would be nice, but it's not everything. The biggest issue for VR geeks is probably the lack of positional tracking. A close second (or first, depending on how sensitive you are) is the relatively low refresh rate (60Hz) causes noticeable strobing for a lot of people. At that refresh rate you don't get the temporal super-resolution bonuses you get at higher rates. Fill factor is as important (if not moreso) for screen-door effect - the CV1 and Vive screens are lower-res, but look much better. AFAIK, the S6/N5 screens don't support global refresh (although there is direct front-buffer access). Lack of physical IPD adjustment is a big deal, and it's hard to solve w/ a single screen w/o sacrifices. Oh, and of course, running the devices comfortably w/o overheating.
More resolution would be nice, but it's not everything. The biggest issue for VR geeks is probably the lack of positional tracking. A close second (or first, depending on how sensitive you are) is the relatively low refresh rate (60Hz) causes noticeable strobing for a lot of people. At that refresh rate you don't get the temporal super-resolution bonuses you get at higher rates. Fill factor is as important (if not moreso) for screen-door effect - the CV1 and Vive screens are lower-res, but look much better. AFAIK, the S6/N5 screens don't support global refresh (although there is direct front-buffer access). Lack of physical IPD adjustment is a big deal, and it's hard to solve w/ a single screen w/o sacrifices. Oh, and of course, running the devices comfortably w/o overheating.