Let's say $1000 each (though this skews low and makes the units moved a generous number)

$1000 x 1000 = $1M 900 x 1000 = 900,000 units moved

Since I'm going to guess they include SP3 accessories in this and that can increase average cost something like 20%, let's drop that sales number down a load and say 500k-700k, likely closer to 700k.

Apple moved >12M iPads last quarter for context.

I really like my SP3 as a main daily machine and think many people will slide into usage of such a device if they start acclimating to cloud storage and/or more enterprise orgs start doing private cloud.

If MS can ride the "private" cloud story into the enterprises where they already have servers, etc. they could provide the better end-to-end story in the next 2-4 years for power tablets that most people from admin staff to executives could use well within the sweet spot of existing infrastructure.

Even if they can't move hardware units, they are already firming up the enterprise software story by going more strongly into multi-platform support for Office, etc.

Out here in the D.C. area I see Surfaces all over the place. They seem to be a favorite of the business crowd that likes to do sales pitches in coffee shops since I usually see them in the context of a powerpoint presentation.

I'd like to get one as a "second machine". The big selling point for me is the OneNote integration. Just click the button on the stylus and you're ready to take notes & sketch. What's preventing me from buying one is the price.

At a base price of ~$800 and a high end of ~$1500: 600,000 to 1.15 M

Surface revenue includes all the other Surfaces like the 2 pro and non-pro/RT though right?

Yes, in particular they are still selling the Surface 2 (RT). I've seen a fair few of them about in the last few weeks.

A few weeks ago, I bought a new Lumia 2520 for very cheap. It's a Windows RT tablet like the Surface 2, but with a Nokia design.

It's actually quite lovely. Windows RT is much better than I had assumed -- I've used x86 Windows 8 tablets before, but Internet talk had given me the impression that the ARM version is pretty bad. In reality it's fast and fluid on the Lumia hardware. Word runs great (and yes, I like using desktop Word on a 10" touch screen).

It's a bit of a shame that the Lumia 2520 will probably be the last Windows RT device ever. Nobody but Microsoft is making them any more, and they're clearly seeing more success from the x86-based Surface Pro line.