Being on the other sid eof the world I can offer some objective insigh there I hope.
You lot are so into the underbody resto. No one does that crap over here. No one powder coats anything, if they take sometihng off it gets sprayed with some flat black spray paint (rattle can?).
Engine dressup seems to be the norm there as well. You go through colour phases. Never saw a black cossie cam cover until recently. Not really a phase I guess, but you don't mess about.
I can say that a recent "phase" I've noticed is using Ford rims on Ford cars. Like some nice Escos wheels on a Saff. About the only aftermarket company that gets money is Comp and TSW. Over here if it's not 22+ and chrome...
Dash flocking. Where the hell did that come from? NO ONE does that over here. I can't find anyone that even knows what I talking about when talking to the trades.
Anit-lag, launch control. That might be the hint. What's next? I think a lot of technology will make it into older cars. Single din satnav, megasquirt, AL, LC, are indicators. Maybe we'll see more full car rewires with can bus or with the new low voltage systems. The wiring in our cars is getting on in age.