Nikon has only one announcement for CES 2018, but it's a heck of a thing: behold the snappily named AF-S Nikkor 180-400mm f/4E TC1.4 FL ED VR. It's a super-telephoto lens with a built-in 1.4x teleconverter, meaning that you can extend the focal length to 252-560mm, though you'll lose a stop of light and aperture in the process.
The lens is designed for full-frame cameras, but if you pair it with an APS-C DSLR you'll get even more reach — 270-600mm-equivalent as standard and 378-840mm with the teleconverter activated. It is obviously gigantic, but Nikon says the use of a magnesium alloy and a fluorite lens element help keep the weight and balance under control.
Nikon will ship the (deep breath) AF-S Nikkor 180-400mm f/4E TC1.4 FL ED VR in March, and it'll sell for $12,399. Which is a lot of money, but not everyone can put a price on taking pictures of birds from really far away.