I don't think there's a way to "view" your XBMC skin remotely over the network. The idea behind having XBMC on either a device or PC is that device is connected directly to the television or projector. Now, you may be able to stream the movie FILES you have stored using your PS3, or maybe your Bluray player, but you wont be able to "see" XBMC itself. If what you're looking for is the ability to stream files over the network and have a pretty UI to select those files, you need to look into getting some devices that can do just that. The Boxee Box is likely the easiest, as that has a pretty UI with a movie wall right out of the box. You can also do something similar with Dune and PCH players with a little work.
Try to think of it this way. You have a media streamer, your PS3, or whatever, which is attached to your TV. You stream movie files over your network to that player and then display it on your TV. You aren't streaming XBMC or anything like that, you're just streaming the files. Some players will give you a pretty UI, some will give you just a list of files to choose from. My guess, based on what you have, that your best current streamer is the PS3, but it is far from perfect. I'd suggest trying to learn to stream to that PS3, and then go from there. That's how I got started, and it gave me a good idea of how it worked, and also what I really wanted out of a streamer.