"TV out should be also mentioned"
It would definitely be a great thing to have, and it's possible (although not confirmed yet ) that at least two models with TV Out will be compatible with the Next Gen games: the N93/N93i and the N95.
"Remains to be asked: When?"
Oh no it doesn't! 😉
The official N-Gage blog recently stated that the Next Gen platform would launch in September 2007, and previous interviews with Nokia officials suggest that at least two of the compatible models are on sale right now. They didn't say which models they were, but personally I'd guess they're the N93 and N95.
"en? I mean, I've been waiting for that next gen gaming phone for ages."
There is no actual gaming phone as such, and there never has been. N-Gage was a 100% standard Nokia smartphone which had a horizontal casing and some DRM software to unlock the games.
The Next Gen will be on a range of different normal-looking smartphones, instead of being restricted to one or two models. There should be about six models which will support the platform at launch, with more appearing all the time as new S60 phones are released.
"One thing though that I don't get about Nokia's logic: When they launched their N-Series, the N-Gage cross-compatibility was a big PR thing"
I don't know where people get this idea from, because it has no basis in truth.
Gaming hasn't been mentioned by Nokia in any of their statements about Nseries. Nowhere in any of the Nseries publicity did they ever even mention N-Gage or even the word "gaming".
The Nseries were meant as multimedia devices, for taking and sending high quality pictures and video as well as accessing multimedia over the internet. All of the advertisements were centred entirely around the multimedia features.
Watch the Nseries commercials again, they're full of people taking pictures, viewing pictures, sending them to each other, listening to music, watching video etc.
The publicity about next gen N-Gage might have mentioned that it would run on Nseries phones, but none of the publicity about Nseries even mentioned N-Gage.
"(tbh. I even thought that THAT was the main idea behind the N-Series anyway)"
Absolutely not.
Most people have absolutely no time for games so it would have been crazy to launch a huge new brand purely to try and enter the gaming world.
As I said in the article, there are 1000 million phones sold ever year, but only about 25 million games consoles every year. Gaming is the pursuit of a very small minority of people compared to using phones or using multimedia. Far more people buy videos or CDs than ever buy games, multimedia is a far larger industry than games.
Even people who buy a games console on average only buy about 4 to 7 games for it before chucking it away. Compare that to DVD players or CD players where people buy dozens of discs on average.
The vast majority of people buy smartphones to use them as pocket computers for things like email, the internet, music, video etc. Most people aren't interested in games.
It's exactly the same as with PCs, most people buy them just for the web, for word processing etc. Only a minority of PC users ever buy commercial games, even if they occasionally play Minesweeper.
"So, what was the point behind the N-Series again?"
It certainly wasn't gaming if that's what you think. The point was to have a range of multimedia computers, which is what Nokia actually calls them officially.