It seems to me that most people that posted agree with me. For the ones that don't, I sincerely hope that'll change. In fact, I expect it to change - it's like I said, give it time, whether you like it or not.
Now, it's 8 pages of posts, so I can't counter-argue everything, so I'll just reply the ones that come to mind:
No, Wii Sports could not be done on the GC. But we all have to agree that motion controls is a complement to a few genres at best, and a gimmick at worst. The vast majority of game genres do not work well with this kind of controls. And the Wii was just one among other 3 - and the PS360 were just prettier versions of PS2/XB games, at first. Here's an example, comparing Heavenly Sword to GoW2, and then inFamous 2 to Second Son:
http://files.connectgame5.webnode.com/200000039-ce714cf6b4/20091120_14.jpg
http://www.gameboxpira.com/produtos/231120121511311.jpg
http://static.giantbomb.com/uploads/original/3/33759/1718469-infamous_2_2.jpg
http://nowgamer.net-genie.co.uk/siteimage/scale/0/0/374721.jpg
I hope I'm not accused of "cherry-picking" since that is not my intention, but could Second Son be done on the PS3? Is it truly just a prettier inFamous 2? Or, using the same words of someone here, would it have to drastically downgraded?
When you compare Killzone and Resistance, does the latter REALLY felt next-gen at the time? Be sincere here - I'm pretty sure I saw a considerable amount of people with rather similar complaints at the game.
About the "we don't have exciting games announced", I'd say that's just a matter of opinion. Look at my sig, and you'll notice I'm truly hyped for FFXV, for example. There are people excited for KH3, others for Sunset Overdrive, there are some even actually looking forward to The Order. And E3 is just around the corner, anyway. But if we don't have anything there, what did 7th gen had at this point? Super Mario Galaxy? We already have Mario 3D World, and if it's not as impressive as Galaxy, is that the gen's fault, or it's just that it's an inferior game, and that's it? You can't say that it was motion controle that made SMG awesome, because it wasn't.
Twilight Princess? The only reason it was a launch title, it's because the Wii is close to GC, allowing it to be easily ported - it's actually a case of a system making a small leap. And Zelda U is certainly going to be announced at E3 - and let's not forget Nintendo are behind, it's their first time with HD games. But again, they are just one among three - and the other two are only six months old.
I've seen someone mentioning that seeing online play or listening to music on the 360 for the first time felt next-gen, but he himself admitted that he skipped the original Xbox. Well, if he had the console, would these things feel next-gen, after using them for an entire generation?
And, like many people said before me, you're looking at the surface. Graphically, it's not gonna be ground-breaking, but the huge upgrade on RAM will sooner or later show its benefits. Maybe it did on already released games, but I'm no technical expert. Much like 6th gen did what the 5th couldn't, and the 7th what the 6th couldn't, we're bound to see the same kind of upgrade happening.