Crossing the Platform Barrier

I like to play games with my friends. However, there's always a problem with conflicting preferences. One likes Console X, while another prefers Desktop A, and another only has Console Y available. It's a difficult conflict when we all want to play the same game together, such as Borderlands 2 where two of my three friends follow the same situation.

So what's stopping Developers from crossing the Platform Barrier? Is it a compatibility issue with the programming? Is it business conflicts between the actual Platform Developers? Or is a big delivery of Wussy Pants to their front door and issued to all employees?

Insofar there is one game that can actually cross platforms, Portal 2 with the help of Steam, and it crosses the PC over with the Playstation 3. This was convenient for me and Scotty who wanted to play the Cooperation Mode.

What Problems did we have?
Voice Communication is a fairly important thing, especially when trying to solve puzzles.  The game panders to that by providing a waypoint feature for everyone involved to look at, but it was certainly no Voice Com, which is why we spent quite a good half hour talking on the phone until we got a grasp of what we were trying to convey with our pointing at random panels and devices through the game.

That was about it.  The game ran smoothly, the game ran well, and we didn't have any problem picking up the game.

So why don't we see this more often?  I could think of other games that would do well playing across platforms.  Your carbon copy sports and shooter games could do well, like Madden and Battlefield.  Granted, the PC players will have an advantage over the Console players (What with the snap firing) but that's where Survival Modes come in, I suppose.

I've got a game called Bloodbowl.  Now I love it, it's great fun.  But could I play it with my friend who has it on his Xbox?  No.  Even though they are basically the same game.

The most innovative application of Cross-Platform gaming I've seen is Skylanders.  Because regardless of what console you've got, so long as you have the figures then you can always play it on a different console.  Whether it's on your PC, your Xbox, your DS or even your Toaster.  It will play.

Only time will tell whether Cross-Platform gaming will boom, but frankly if I can get onto my Playstation and start playing the same game with my friend playing the same game on their Xbox, then I would be happy as a pig in shit.