wiimote is still used in wii u

kinect wouldn't exist if not for wiimote

fact is, it was innovation on human interface

Steam was launched less than a year after xbox live. Large online infastructures would have existed in the next gen with or without xbox. Yes, they did it first, and yes, I give them credit for it. But I don't think they deserve as much credit as they get for it. They did introduce acheivements, which are fun, but not that massive of a deal. 

Meanwhile sony introduced PS+, steam made massive sales popular, and nintendo did make motion gaming big even if just for one generation. Sony and nintendo have made many innovations with games themselves. Valve made many as well, with their games and with online gaming and infastructure. 

While microsoft introduced unified networks, they also introduced unified networks that you pay for. The strategies microsoft employs to "make " games hinders gamers, considering they more or less pay to keep games off of other platforms instead of publishing original content. 

I think valve should be on this list. I'd say valve, sony, and nintendo is a toss up for number one depending on how you slice it, and microsoft is last. 

The Wiimote mono speakers were the main reason for Wii Sports success!
Motion what you say? Nahh.

Gamepad didn't innovate but just evolves it to stereo.

No. Sony is a hardware company. Their bread and butter is finding new ways to do things. Nintendo isnt on par with Sony when it comes to creating hardware, hence why Nintendo brought them into the industry. Microsoft brought what was already status quo from the PC realm to consoles, thats all.

Alright, you're all distracted.

The only innovation that is relevant is stuff that has carried on to this generation. And Despite Lucidium being right for the sake of argument lets qualify it as innovation in the console realm.
Objectively speaking I would say (right now):
1. Nintendo
2. MS
3. Sony
If we limit it to 8th gen now.
Nintendo: Tablet, Controller Off-screen play, Dual Screen Play
MS: Snap, HDMI in
Sony: Touchpad

In terms of Development:
1. Sony: PS Now, Morpheus,
2. MS: VR?, Illumiroom (Canceled)
3. Nintendo: QOL

In Terms of OP:

1. Sony: Camera Peripheral, Backwards Compatibility, Bluray game support

2. Nintendo: Motion Peripheral, Cross Platform Play

3. MS: Online Marketplace

I'm probably missing some but I think the order is correct.

Wouldn't Backwards Compatability go more to Nintendo since they can go all the way back with just a Wii U?

PS2 is the reason i give it to Sony, its also the reason I don't give camera to Xbox
Its also why I don't include emulation. Since the GC couldn't play 64 games.

I would also add cross platform play to Nintendo, which would put it ahead of MS because of GBA and GC link.

Sony

creating a new genre of games with play create share
eye toy. First thing of its kind.
3D gaming abit the execution is questionable
PS+ gaming collection

Nintendo

Touch screen gaming but thats handheld so i aint sure if it counts.
Motion controles with the Wii though sony were already experimenting with the move at the time, nintendo got it ut first.
Balance board
Casual gaming boom on consoles
Sound coming from controller.

Microsoft

Achievements
I would say XBL but Sega was going in that direction anyway, had they survived I do not doubt for a 2nd they would have somethig similar.

Microsoft for making an online community essential to gaming, it's a whole new dimension.

The Wii and DS were also quite innovative. Motion controls and Dual Screens have added some interesting gameplay to some games.

Sony just played it safe and done what they know. While waiting to see what the competition does first and then improving on it

Like Backwards compatibility, console game streaming, console twitch streaming,  dvd/blue ray play back, console wifi, symetrical control sticks, free to play MMOs on console...