If I would update Snow Leopard to Mavericks, would I have this?

Question

Hello, everybody!
As I got no real experience comments from people who updated Mac OS from Snow Leopard to Mavericks on a MacBook White Unibody, on this discussion, now I'm trying to be more concise, and ask you for more specific questions on the matter.
So, if I would updated to Mavericks, Would I have…?
VoiceOver Voices in different languages, as they come from factory since Lion, or stayed just with the English ones I have now?
Full Screen capability of all apps at the same time? Now, it's like my PC has only one "Full Screen", so, when you open one app on Full Screen, all the others go to windows.
The newest versions of iLife, iWork, Photo Booth, Stickies…? Now, I have Garage Band 6.0.5, iPhoto 9.2.3, iMovie 9.0.4; iWork 9.1, Photo Booth 3.0.3, Stickies 7.0
iChat, iWeb, iDVD, Front Row, X11… as I have now, or would them be erased or changed for other apps? Or I would not  be capable for running them, as the Power PC apps I have and can run now?
Chess app in Spanish too, as it comes from factory since Lion, or it still remains only in English, as now?
Spanish dictionary on Disctionary app? Now I only have English and Tesaurus on my Mac, and the capability of searching on wikipedia on internet from the app?
Timer Coalescing, App Nap, Compressed Memory, GateKeeper, app's sandboxing, Automatic Versions… or any of those is not allowed on my MacBook White unibody?
The ability to see the complete miniature windows opened on the same desk as easy as sliding up four fingers on the trackpad (as I can see now the ones opened on the same "Space")?
To update my RAM? Now I have 2 Gb, and I saw it is exactly the requirment of Mavericks. I'm not sure which was the requirement of Snow Leopard, which actually runs pretty fine.
This is enough now for helping me to take or not the decission. Thank you all.

Answer 1

app nap - appears to work with Mavericks according to Apple:
http://www.apple.com/osx/advanced-technologies/
I've been looking for it again. You say App Nap would work on my macbook white, it seems it wouldn't, according to:
http://www.apple.com/osx/specs/
Power Nap
Supported by the following Mac models:
MacBook Air (Late 2010 or newer)
MacBook Pro with Retina display
iMac (Late 2012 or newer)
Mac Pro (Late 2013)
Mac mini (Late 2012)
At least, one question less :-). I'm not quite as sure with all  the rest of new odd and eds…
PPC apps haven't been supported since Lion was introduced (2011).
Your iLife will be updated;
iWeb has been discontinued. So has iDVD, but if you have it installed, it still works. Front Row was discontinued. No idea about X11.
PowerPC applications are supported on Snow Leopard, my actual OS. As apple does not mention anything about on http://www.apple.com/osx/http://www.apple.com/osx/advanced-technologies/, I can easily guess that same thing could happen with other apps, like FrontRaw, iWeb or the others apps I mentioned. For me, it sounds strange that apple offers its best ultimate OS just for free. I think there's something hidden for user like me, with Snow Leopard., for instance, not to update Voice over Voices, PhotoBooth or anything else…
I'd like to be completely sure of what i'd have, for example if I'd have spanish dictionary and VoiceOver voices before updating. If not, probably it does worth to do so.
Sorry, but how do you propose having more than one app at full screen at a time?
By means of something we call SPACES on Snow Leopard, and you called MISSION CONTROL, if I'm not wrong, on Lion and upper. You can switch among different desks running every one a different app on FullScreen, can't you?
By the way, which OS did your macbook pro come with from factory? the one that is running mavericks now.