I wouldn't be crazy for it, but at the same time, poor guys are stuck with linens, plates and kitchen things, which I'm sure they're not too excited about. So hey, why not give them the chance to have a few things for themselves. Usually newer play consoles can play blue rays or DVDs so they might still get some use (you could watch your wedding video on it? haha)
I don't know if my guests would be up for paying for trips down to our wedding AND a game console, but maybe a bunch of friends can get together and buy something from the electronic registry. With my friends that's usually what we do, we all pitch money in to buy a bigger gift for someone. I find that the items on an electronic registry would be much more expensive than one at, say, bed bath and beyond, where you can find a wide range of prices, but maybe you can have both. People will spend how much they can so if it's too much for them they won't buy it.