Actually there are other programs that are even more dumbed down the LBP. For example the one i linked couldn't be any more dumbed down.
Basically you are saying what it going to make it different is that it's on a console. (make you own games have been on consoles before.)
And that it's going to sell well. (Which has yet to be seen.)
I'd argue that creation of game content is in of itself a niche market, sure everyone like the occasional customization of your character, but very very few people are going to have the paitence to make their own stages. Even with the most user friendly interfaces.
It's also anything but casual. Well unless the level sucks. I don't think your average casual player is going to want to go online and search for good levels to play. I don't think your average casual user even has their system hooked up to the internet.
To me this feels more like all these other games feel like. A guy or two makes a few sweet stages... (Well he thinks so anyway) and bugs his friends to play it.
I think this will pretty much pitch to the same demographic that likes to be D&D dungeon masters. I'm not seeing too many soccer moms coming home and spending time making stages and puzzles.
Just because it has cutesy graphics doesn't mean it's casual.
