Call it what you will, but that's a very narrow, offensive and - dare I say - childish opinion to call it childish. It's called being fiscally responsible, by putting money towards things of greater import and value.
Making the assessment that it'd be smart for ME to wait is MY opinion and hardly a complaint; there is plenty last-gen to play, and plenty from way before that, too. Could just as easily enjoy previous gen stuff. I love me some Dead Rising 3, but waiting a year is no great loss. If you're going to disvalue and attempt to attack me because my opinion doesn't align with yours, there is a good place for you to stick it.
Argument that I/we can enjoy the console for a year is quite flat when most of the best titles slated for this year have been pushed back to 2015. The resolution bump isn't that big of a deal and is frequently non-existent.
Mordor may be the breakout title, in this sense, as the X1 version is said to include the Nemesis system in a way the 360 can't (or doesn't). So, at least there is something - for me (and others of like mind) - to look forward to. THIS year.
I meant that kind of complaint in general is childish, not your specific comment. But I know I wasn't clear on that, so my bad.
With any gaming item (and even movies, tablets, etc.) you buy, there will always be price drops and such. The early adopters never get the best deal; we pay more, the consoles we get are bulkier and use more power,we don't get pack-in games, the hard drives are smaller, etc etc. It's something that anyone who has played games for long enough knows and understands. So whenever someone stands up and shouts, "Hey! I could have waited till next year to buy this new system and I would have saved $100 or whatever and there'd be more games to play when I got it!" it's a huge non-revelation.
As has already been pointed out, the benefit of being an early adopter is you get to use the new product while everyone else sits and waits. With online games, you also get to enjoy the most active multiplayer community before the community eventually dies down (though also a ton of bugs and issues with some games like Battlefield 4). If someone is highly concerned with his backlog, then why is that dude thinking about playing next gen games instead? Not logical.
The other reason to buy a new console right away - regardless of whether games are still coming out on Xbox 360 and Playstation 3 - is for increased fidelity. Higher resolutions, better frame rates, improved textures and effects, faster loading times... People who bought a new system right away are probably ready for these things. They're a little tired of games having largely peaked technically on the old systems and want their games to run a little nicer. These players don't care if Mortal Kombat X and Forza Horizons 2 come to Xbox 360 because the version they'll be playing will be better. Some people are happy with DVDs, while others want Blu-rays because they're nicer; it's the same mentality.
Those are the two real reasons to get a new console at launch, other than really wanting a specific title. If one or both reasons don't apply to you, then choosing to buy the new console was never going to make you happy. These things work on cycles and it's the same every time a new generation starts.