It seems to me that the real generation gap - and hence signifier of one's real age - centres around digital technology rahter than anything else. No longer is it fashion, music or politics.
I mean we all dress pretty much in the same way these days, don't we? Hoodies, desert boots, skinny jeans, chinos, khaki, muted colours...etc
A person from the millennal generation might well enjoy the music I listen to, and I their's (or might not: the point being it is no longer a generation thing so much, just down to individual taste). A guy in his fifties could be into Cannibal Corpse whereas a kid of 18 might be heavily into Yes.
As for politics, I find myself increasingly in sympathy with the Millennials - minus the snowflakiness, that is (and anyway, the prevalence of this has been much overstressed by certain media outlets).
But when we come to technology...oh dear, oh dear.
I know that some of you on here are real techo-nerds (and thank god for that!) but I for one am much more of a digital immigrant than a digital native. Most software technology for me has never been anything more than a work tool which I have been obliged to learn about in order to do my job. A bit of a nuisance, in other words. Of course, I use the web, and have a blog, and stream films and so on - but what distingiushes the millennials attiitude to digital technology is that they see it as the be all and and all (not just as another media option, as I do) - plus the ease and serenity with which they constantly upgrade and also communicate between different gagdgets (ie sending things from their phones onto their laptops, etc).
Interestingly, the show
Not The Nine O'Clock news absolutley nailed this techo-generation gap phenomena back in the seventies in (what has become known as) The Gramophone sketch. Every time I enter a phone or computer shop I feel
exactly like the Mel Smith character! Especially, for example, when he asks for something that can play his old 78's. (I want something that can play my old DVDs!) The Hi-Fi snobbery of yesteryear has been replaced by a similar attitude around phones and PC's. - so nothing is new. (What gives me succour is that the Millennials will eventually find themselves similarly bamboozled by some new type of technology that comes along in thirty odd years time!)
Anyway, here;s the sketch - and if you like you can see it also as my belated tribute to the late, and occasionally great, Mel Smith:
[Edited owing to technical problems!]