Speak for yourself. They're still technically impressive. No other 1/6 company is attempting anything of the sort. In that regard, HT stands alone. Also, their breadth and depth of product is staggering.
It's not that HT does one thing very well. Sure, their head sculpts are fantastic, but so are Sideshows. Their paints apps are exemplary, yeah, but so are Enterbay's. Their articulated bodies are awesome, but again, Sideshow (and even Medicom, among others) have caught up, almost. Their outfits are incredible, but other companies have done it just as well. It's that HT does all of these things tremendously and consistently well is what sets them apart.
As for DiD, yeah, the heads look fantastic. Are their final production units as impressive? Any pics?