Re: LTSB
Agree there hasn't been much mention of the three "servicing branches" of Win 10, namely: CB, CBB, LTSB. I think in part because LTSB, other than the evaluation version, hasn't been formally released to market yet.
The LTSB branch does seem interesting, given what it does and does not contain, I can see many businesses going for this variant, primarily because of it's stability - effectively it will be in "extended support" for 10 years rather than the 5 years of Win7 and 8, but also for the MDM and deployment tool MS are saying it will have and support.