i think it looks like a frankenstein recorder. plastic housing, volume knobs on the mic's (!?).. this cannot be of very good construction quality. best thing is de dedicated rec level knobs and tracks buttons.
it could be useful for a novice recordist/student. lot's of recording methods to choose from and learn to work with.
A very quick hands-on with it.. http://www.youtube.com/watch?v=fuxzq20uduI Seems less.. disposable than the H4. The make or break will be the pricetag.
It's a cool idea, but with that many options and channels I hope the price is fittingly high. If each mic capsule is built with quality then it might be a great add-on to our kits — here's to hoping each mic sounds like more than an H4n with a different polar pattern, otherwise I'd say Zoom will have wasted an opportunity. A quality analog limiter would be a good addition, too...
I did a small comparison between the H4n and the H6. The H6 seems to be a good value, but is definetly too big for me to carry around every day... check the full comparison and audio previews here... http://bit.ly/16mqT4R