We'll see how it pans out, then (but only if we watch very carefully - how often does the subject of Russian government computer OSes come up?). At the face of it, it seems odd to me to encourage the widespread adoption of Baikal when they have already made certain commitments to an OS that currently only runs on x86 hardware and supports x86 binaries.
As per your links, the president gave a visit to a highschool where a ReactOS developer just happened to be a student and got a totally impromptu presentation, where the student also asked for money. The president said he was impressed and he'd think about it. How do you equate that to the Russian government having made commitments to use ReactOS?
It's no surprise ReactOS would look impressive at a glance, since it purports to run Windows programs without Windows which would save the government a lot of money in licenses and would give them more control over and ability to audit the OS. From a simple visit alone you wouldn't be able to determine important things like what its broad compatibility is like, so it figures that they'd say they had a good impression and would look into it but not commit to anything right then. This all happened a couple years ago, things have changed politically and events have happened with the US that I guess made Russia more reluctant to use x86 hardware than they were back then - not to mention, two years ago you couldn't license a 64-bit ARM core.
Of course, that makes me wonder what the point of ReactOS for ARM is/was in the first place, unless it is to use a compatibility layer to run x86 apps on ARM equipment. Regardless, it doesn't work yet.
There's more to the OS than the ability to run x86 Windows people, so there's bound to be someone who will want to run it on ARM devices just for the rest of the OS experience. Probably just to tinker around with and nothing very serious, hence why it's gotten so little attention.
I expect that the market value of Baikal will be somewhat determined by overall performance versus current Intel/AMD offerings. Other price pressures, such as availability, will determine the final price.
This is assuming it'll even be made available off the shelf, since a lot of stuff made under government contract isn't. At the very least I think there'll be some delay. Either way they'll probably get a ton of money from the government, not just for the order but for the development.
It will be interesting to see exactly how well production proceeds for Baikal. If it is enough of a success, maybe it will start showing up in devices outside Russia as a competitor to Loongson or various VIA products.
I doubt it'd be very competitive outside of Russia, where there will already be other 8 and 16 core Cortex-A57 SoCs. Like the ones AMD announced.