Its difficult to appreciate the variation between current-gen and next-gen in TV commercials or a browser window, but up close and personal, the difference is drastic. Whereas the current-gen versions look muddy with blotchy textures, characters, weapon models, and environments are presented in vivid detail on PlayStation 4 and Xbox One. The Call of Duty engine fares surprisingly well on next-gen, but even then Ghosts lacks a lot of the added atmospheric effects and visual panache that makes competing games look so realistic. Im eager to see what a future Call of Duty looks like when maintaining 60 frames-per-second on current-gen is no longer a concern.
When comparing the PS4 and Xbox One versions side-by-side, theres little to no variation in textures and effects, but there is a discernible difference in resolution. While both are displayed at 1080p, the Xbox One version upscales the game from 720p resolution. In contrast, the PS4 version runs natively at 1080p, which makes character models, weapons, and environments look noticeably sharper and more detailed. The difference is especially apparent on larger-sized TVs, where pixel density weighs more heavily in picture quality.
Its certainly going to be a sticking point for those who demand the highest fidelity experience, but the difference is harder to identify in absence of a side-by-side comparison.
Oddly, the Xbox One version makes no use of the haptic feedback motors built into the controllers triggers, and the DualShock 4s trackpad is used solely as a button to toggle the in-game scoreboard during multiplayer.
There is, however, one notable exclusion from current-gen. Historically, Call of Duty has limited a majority of its modes to 12 players, but offered an additional playlist that supports 18-player matches known as Ground War. While the larger-scale matches live on with the PS4, Xbox One, and PC, owners of the Xbox 360, Wii U, and PS3 versions are capped at 12 players. Its a surprising step back for the series, and the larger maps could have benefited from the higher player count.
It should also be noted that my smooth multiplayer experience was hosted on a dedicated server hosted by Activision and most of yours will be, too. Activision says that all platforms will use a hybrid of dedicated servers and peer-to-peer matchmaking, which should eliminate many of the lag issues we've seen in the past. If all goes well, the days of being tossed into a game hosted by someone 2,000 miles away on a dial-up connection will be behind us.