Internet search existed before Google, but they came up with a newer and much better way of implementing it. Internet email existed before Gmail, but they vastly improved the offering. The iPhone already existed, but they came up with an alternative in Android. Same story repeats with GSuite, Chrome, Chrome OS.
YouTube was sort of new, but it was an acquisition, so I don't know if it counts.
When they do have ideas for innovative products, they fail to deliver.
I forgot about the Chromecast, that's a good point.
Stadia is close to being new, though there have been similar efforts for some time now. However, it is by no means successful so far, most reviews I have seen from the gaming press have seen it as impressive, but ultimately not a great way of playing games, and Microsoft's offering is likely to quickly outshine it by sheer force of games catalog.
Stadia is at best an incremental improvement to PS Now or OnLive afaik. Other companies, notably MSFT and Sony, have been developing this same stuff for years, and Nvidia even has their own version I think.
A good example would be if Google's Stadia succeeds. Even though there have been attempts in the past (e.g. OnLive), the mind-share is so low that they are almost irrelevant. If Stadia gets anywhere near console-level market penetration, I would consider it an innovative product that Google created. I don't expect it to succeed, though, based on the track record.
I think that's way overstating it. Long before iPhone people were asking for more software features out of their phones. Browsing, email, music, etc.
Even the touchscreen and the development model were things tried in the past with many attempts by various companies to make the PDA a success.
Apple did exactly what you say. They took a few ideas whose time had come, ideas that just happened to be in their wheel house from the work they did on iPod and presented them better than anyone had before.
(yes of course they and I would get bored of a life of endless luxury - but I would like to at least try it and see how long I can hold out ;-)
Why spend their own money on a risky capital intensive venture when their cash engine let them do it unopposed?