New Champion Inverters-dual fuel, parallel, and more watts

I currently have (and like) the original style champion 3100i pull start generator. I'd like to have propane or extended run options, but still generally satisfied. In researching options for these add-ons, I see there are some new products out in this field. Info seems limited at this point, but at Costco (and the champion web site) there is now a dual fuel remote start 3100 generator available. Of note (aside from the dual fuel, is that this generator has paralleling terminals. Makes me wonder if my old 3100 could be paralleled with a home-built kit (though I'm not sure what the value of 50 amps of 110v is, but hey...

Also, I see the same generator at the Cabela's website rated at not 3100, but 3500 watts... very interesting...

Anyone know much about these new models yet?