"you haven't answered my question "what is so differentiating about those games?""
In the case of Kid Icarus, it's a matter of controls. There is no game that controls like Kid Icarus Uprising, which uses a unique twitch based combat system. Have you played the game? Because it's a bit difficult to describe. The game also features a unique weapon building (or breeding) system which is incredibly deep, and unique to anything in other games. The difficulty system, the fiend's cauldron, is another innovative mechanic that presents a different idea on how to change difficulty. The game also features a unique spin on multiplayer (light vs dark is a blend of traditional team battles and juggernauts mode) and so on. The game also has a comical vibe that helps it stand apart from most games.
Luigi's Mansion again is mechanically different than pretty much anything out there. The battle (or vacuuming) mechanics are different from pretty much any game out there, as is the overall theme of the game. Simply put, there aren't a whole lot of games that revolve around vacuuming ghosts.
"what is playstation home? isn't playstation home a minigame hub?"
Home has minigames for sure, but it always struck me as more of a second life kind of thing that really focuses on social interaction and personalization. It's actually something that is pretty unique that I didn't give Sony credit for. So far, it doesn't seem like Nintendo is going that route with Nintendo Land. I could be wrong, but Nintendoland doesn't seem like a virtual hang out of anykind. The theme park itself just seems like a glorified menu. The innovation comes in the form of the actual minigames.
"thats pretty ironic as i've heard people say the same thing of wii sports"
I think people say this because they're looking at Wii Sports from the hardcore gaming point of view. The beauty of Wii Sports is that it's something very simple and intuitive, and it struck a chord with casual gamers like nothing has before. It was something I was able to play with my 5 year old brother, my 50 year old mother, and everyone in between. Regardless, the point isn't necessarily how polished the products are. The point is, that the products in question are very different.
"so sony and microsoft didn't do the same when they released their own motion sports games?"
I'm just going to focus on Sony, and no, I don't think they did. The Playstation Move is fundamentally the same as the Wii mote, and only offers mild advantages over the Wii-mote +. Ping Pong was something we'd done in Wii Sports Resort, as was Frisbee golf. The differences in those games were mainly visual. Archery again was pretty much the same as Wii Sports Resort. Sword fighting is present in both. In this case, the Sony version is somewhat different in offering a more complex game, although I think the changes are mostly for the worse. Bocce is a random inclusion, and Beach Volleyball is unique. Overall, we have incredibly similar hardware, 3 identical minigames, 1 somewhat altered minigames, and two new ones. Your opinion may differ, but I don't think this is significant change or innovation. Based on the Move's failure, I think that the masses are in agreement.
And that also encapsulates how I feel about Playstation All-Stars. Based on what I've seen, it doesn't seem that this is a significant improvement over Smash Bros, and it doesn't seem to do anything very differently, aside from its KO system. Instead of taking the idea and making it their own, Sony just took the idea.