I'm not sure it would have the same effect. My parents have a vacation home near where I live. Sometimes I go there for the weekend and I still use the internet, but it's so much more relaxing because I'm physically separated from my home and normal life where I have a lot of responsibilities. To declutter your mind you have to remove yourself from all of your physical clutter, and I don't think you can do that at home. But, getting a room at a local motel would probably work. Maybe even leave your phone at home.
I agree with you and I have done this, but I mentioned it because I don't think most people have. That said, I think the clutter in your home is deeper than the actual physical clutter. Even if you clear all of the physical clutter, you still have what I call "associative" clutter. Every experience (good and bad) that you've had in your home adds to this mental clutter. I still think it's important to get out of your home and go to a simple place frequently, nature would probably be a good option too.
People can also swap houses with a friend for a day or two. Any time my girlfriend needs to concentrate, she comes over to my house where she's afraid to touch my electronics and synthesizers ;)