Truth is, I don't care. At all.
I wanted a 2008 Mac Pro in 2008. I found the old forum posts elsewhere, where I hackintoshed and kept saying I was going to replace it with a legit Pro. Instead I bought a MacBook White and an Intel Mac Mini, which I could afford, and then replaced the Mini with a MBP that I could afford. Two years ago, I did it again, selling that MBP and getting my current one. Because the Mac Pro was just out of reach, too expensive for its lack of portability.
It's now 2017, and I just bought a 2008 Mac Pro, just like I said I would... and it runs better than my MBP for my editing workflow. And with all the internal storage space I could even, no kidding, go back to 10.6 Snow Leopard and install Premiere 6.x and my various codecs (I use the same ones), and even edit in 720p or 1080p (no source I have is higher than that) on spare drive and just dual boot between them, with specs I could have only dreamt about in 2008. This is going to last me years...
...and then I could just get a 4,1 or a 5,1. Why the hell would I care about the 2018 Mac Pro? I'm a prosumer, sure, but there's no new Mac Pro for me. I need the expandability, I need to ease of open and repair of a nice tower (I LOVED the flip side case of the G3/G4 towers), I need more power than the average user, and want a dedicated editing rig that isn't my facegramtwitcord dropcloudmegatube mobile device (my iPhone and my MBP do that) but not the extremes of the professional.
Apple doesn't currently make a hardware product for my editing life. And if it did, well, it would look a lot like the Mac Pro 2008 I just got. Specs included. Except new. Screw your iMacs. It's not mobile enough to replace my MBP/iPhone, and it's not open enough to replace my 2008 Mac Pro.
I'm good, thanks.