Win CE is not Windows NT Embedded.
Perhaps there will be Phone 7 version of Windows CE for Embedded. But the article seems to be talking about the NT family, not CE family,
It's hard to see how this Windows 7 version of NT embedded will get traction in more than ATMs, Terminals and POS (Point of Sale Terminals/Tills/Cash registers), which already use Windows. These don't get updated, support for Win 3.1x only just finished for Embedded (POS mostly). Only new products get the new OS.
Win CE --> ARM
NT Embedded (AKA Win 7 embedded now) --> x86, x64
There are also plenty other chip families used for embedded. Also neither Linux nor Windows NT are "Real Time Systems". Even Real Time Java/Solaris or Real Time Linux Kernel are fudges compared to "real" Real Time Systems.
Only a small fraction of embedded systems need a RTOS.
Also only a very tiny fraction of Embedded Applications are Terminals (like the Wyse), ATMs or POS. Maybe the POS for the petrol (gas in USA) pumps may use Windows, it's unlikely the actual pumps do.
Windows CE (ARM) and Windows Embedded (NT4.0, XP, Win 7) won't run on many of these
Anyway, back in 1993 the big selling points of NT (3.1 then) was
* true 32 bit OS with pre-emptive multi-tasking and protected kernel
At one stage they supported MIPS, Alpha, 64bit Alpha on NT4.0, power PC, 386, 486, Pentium, and Pentium Pro. I think since NT 4.0 embedded (which is componentised) they have gone backwards. CE was always a sort of cut down simplified version of NT with very limited number of processes. Originally it too supported a few more CPU families than ARM.
NT4.0 was less layered than NT3.51 as they moved the GDI into the Kernel to get a 10% or so improvement in Media playback/ Video/Animation. Direct X was a reversal also ot layering and HAL basically to encourage porting DOS game designs. It goes against all principles of clean API (have you seen how much docs it is?), HAL and clean OS design. Ditto the change with Vista and Win7 of how GUI is done to now make it use Direct X/Direct 3D essentially rather than the original layered HAL concept of design. So that Eye Candy runs faster.
They need to throw away Windows and start again. The new Windows 7 phone seems to be just ditching the stupid Desktop GUI and bolting Zune GUI on the same underlying Windows CE, but I could be wrong.
Apple did it going to OS X from OS 9, though their choice is hardly a new OS design, just new eye candy on basically a 1976 design.