An ideal collaboration would be Apple and Nintendo. Imagine a Switch using an A-series chip. That thing would be crazy.
Very much doubt this would result in new bespoke hardware. Why would anyone want that? I already carry enough stuff around with me.
It would be a licensing deal to get sony software on whatever hardware apple is already selling to people. And as far as nintendo goes - you can bet it won't be an exclusive deal with Sony. Apple don't need to make that deal and will court nintendo too.
As per the video - Sega were the first massive console hardware vendor to go under as far as hardware goes. They won't be the last. The days of gaming devices being specific to gaming, especially in the portable space - when people are ALREADY carrying a massively powerful CPU/GPU platform in their pocket... are OVER.
People are already refreshing their phones every 2-3 years, they will continue to advance FAR quicker than the 5-10 year console cycle. Plenty of people are still on PS4 and Xbox One. When did they come out? How many people haven't upgraded their phones 2-3 times since then?
Oh and in addition to the above re: using an iphone as the sony portable target - guess what SOC runs in the AppleTVs?
If you already own an AppleTV and iPhone - you already have the same sort of platform capabilities as the nintendo switch - if not faster. The switch hardware is junk at this point and was never fast. it's the software. That's what apple stand to gain out of this, and Sony gain a platform for their software to be ported to without spending a cent on building a mobile SOC that will struggle to outperform Apple's mobile SOC on release - that will get refreshed much more quickly anyway.