While I would say that Sony did bring some new concepts to the table, the main distinguishing factor is more that they focused on multimedia aspects of devices, PS1 doubled as a cd player while giving better deals to third parties, but it wasn't the first console to use discs, just as it wasn't the first console to have a 32 bit processor. The PS2 allowed for DVDs to be read, while adding the idea of backwards compatibility, whilst making the graphics better than both the PS1 and N64. The PSP acted in a similar light, allowing music on the go, as well as videos (I don't remember if I just downloaded that illegally, or if it was apart of the system). After this however, Sony more or less was the same as its competitor microsoft. Yes it did bring in more ideas, however these ideas were tried by its competitors, while PS2 had internet capabilities, I believe that the Xbox Live was better for the time.The wiimote had a speaker in it before the playstation had a controller that did.
Many of the things you pointed out about the PS3 and 4, in my eyes were just natural evolutionary steps, with the exception of the psmove (copied from wii), everything you listed for the PS3 was really related to graphics. The things about the PS4 was just minor things, I never really used the touchpad, actually I found it quite annoying, and using x86 was kinda a given for this era in gaming.
In short I believe Sony's biggest strength came not from innovation, but rather from being able to see what worked well and what didn't, it wasn't really innovating so much as copying and pasting. Does this make Sony a bad company? No, it makes them a great company. Does this make Sony innovative? No, there consoles are in an evolutionary pattern, building on the previous and ditching what it doesn't need. This does mean that as you stated, they do the good job of looking at what can be improved, but calling them innovative is a bit of a stretch.
Also N64 did a lot more than you give credit, with a rumble pack, analog stick (which sony copied), personalized controller memory, etc. It wasn't a single Idea console.
I will admit I own every nintendo console except the gameboy advance, but I also own a PS1,2, and 4, as well as an Xbox and Xbox 360.