PuzzleQuest is a good example of a game ported to almost everything. Which is how i think most games should be. Because frankly, I don't want to have to have $1000 worth of gaming hardware (not to mention the room) just to be able to play a game I'm interested in.

Now that you mention it Ace Attorney Investigations seems like it could be a Wii game too. Perhaps, Capcom will port it up.

That being said, I wouldn't be surprised to see Phoenix Wright appear on other systems platforms someday.

And yes, 6:

The original GBA games, then the PC and the DS and the DS re-released and then the mobile phone games.

I was hoping it would be a beefed up retail remake w/ voices instead of Wiiware ports..

- different processors, requiring different code
- different architectures, some systems use multiple CPUs, some have touch screens, games would need to be retooled for each
- non-3d assets do probably not scale well across the different screen resolutions
- some systems have a lot of local storage, others very little

Then there are organizational hurdles:

- licensing issues
- company philosophies
- developer manpower
- money

In short, every developer would love to have their game available everywhere at once, and if it would be possible they would make it happen. It's not, and its the “fault” of the diverse set of gaming systems available. But because of that we also get many unique and interesting games, so I say we still win.