These are good places to start looking:
On other threads in this forum, it has been suggested that 4K video will become popular for consumer camcorders. And when are the 4K televisions being introduced? 4k is a production standard for making movies to be shown on movie screens that are 60 feet wide, but at lot of people I know are watching their movies at home upconverted from standard DVDs distributed at 720x480.
I don't expect to see real 4K camcorders for consumers soon.
We are still waiting for it on mid priced professional models. Only a very few high end cinema cameras have 4K at 4:4:4. Most are 4:2:2. The Red epic is likely the forrunner of medium priced 4K cameras, but it is stil way more expensive than a consumer camcorder. Its modular, so you have to buy several pieces to get a working unit. Its estimated that it cost about $2 million for the Red epic, accessories, and lenses for Peter Jackson to shoot "The Hobbit" The camera itself only cost about $58,000, but it is only a tiny part of the total cost. This is cheap compared to other 4K 4:4:4 cinema cameras.
You can buy a 4K monitor, but it might be more than your want to pay.