Figured I would answer from my perspective.
1) Active Directory
2) Part of the imaging process
3) Active Directory with schema additions
4) We run Deploy Studio, we don't necessarily need OS X Server for this
5) How is this relevant to Server? Also, why doesn't ARD count?
6) AD
7) Not necessary
8) Not necessary - although, what exactly do you mean here? Why would you want "Mac Only" services?
1.) The Build in AD plug-in is mediocre at best.
2.) Monolithic Images are a terrible way of managing an Enterprise Environment. The proper way would be to push a policy. From the sound of the network it sounds like all of your users would be Admins as well meaning they could easily unbind. Policy would prevent all of that.
3.) The standard Schema extensions provided by Apple are hardly enough to even scratch the surface. Also, scalability is limited, as well as these Extensions are UNSUPPORTED by Apple.
4.) Deploy studio is not an enterprise solution.
6.) ARD is irrelevant because it does not allow things like connection VIA SSH meaning you are limited to connecting to machines. Remote Netboot cannot be completed without scripting and you can only push PKGs and MPKGs (if you use Casper you can push DMG files which also when pushed populate custom preferences to user_template.)
7.) SMB in OSX is severely outdated and full of security holes.
8.) Fair enough.
HP and Dell don't have any official roadmaps, but every year when Intel releases new CPU they release new servers with them. sometimes we have 2 years of a server generation but with CPU upgrades. we still have a bunch of gen 1 to gen 4 HP servers and getting rid of them little by little. larger organizations do it faster since the ROI on replacing old servers with new G7's is amazing.
with Mac Pro and XServe not getting an upgrade for 2 years and still costing a ridiculous amount of money there is no way you can justify a return on investment
I have the official HP roadmap on my computer right now directly from HP. It matches our EA with them.
Sorry, nope.
That is all you can do with Active Directory out of the box. If you extend the AD schema you get full control as if you were running OS X Server.
It would be impossible to utilize Windows GPO in OS X, without extensions to AD.
This is why most use the Magic Triangle.
The schema extension is a cheap bandaid that any real administrator would avoid. Its an unsupported script provided by Apple Engineering and is limited to I believe only 16 extensions vs. Casper or Centrify which offer unlimited scalable extensions and is supported.
Services for Mac were dropped in Microsoft Server 2003.