Ok, I have this idea that I want to follow through with if it won't cause any issues while I'm building my unattached kitchen/man cave. I got this idea on HGTV over a year ago, and would like to incorporate it since the kitchen is relatively small. I also have a small living area in the room, and the peninsula will give it just enough of a break, but still keep the open aspect.

The cabinets will end at a 33" lazy susan corner cabinet, and have a 15" cabinet with drawers attached. This gives me 48". I would like for the eat in island/table top to go out to 84", and have attached table legs on the end. Would this 3' span be too long without anything supporting the antico bianco granite countertops? I'm attaching a couple pictures for reference. One from the show I got the idea from, and the other from a program I used to mock up my kitchen...

Will the span be a problem for the weight of the granite? As of now, it is set to be 36" deep as well...I am thinking about shrinking that down to 30" like a normal table top and still have plenty room. The cabinet and granite company doesn't think it will be an issue, however the sales lady hasn't spoken to the installer about it yet.