dude why have a discussion of the ending when no one even started the shit yet
People have been playing it for the past few days, if we're talking about it being played in general

I spoil shit for myself all the time as well, knowing whats ahead hypes me up most of the time. I'm not one of those people that treat spoilers like a virgin experience.
Also, forgot to steal more info from NeoGaf.
4 Factions:
Brotherhood of Steel
Minutemen
Railroad
The Institute
13 Companions:
Cait
Codsworth
Curie
Danse
Deacon
Dogmeat
Hancock
Maccready
Nick Valentine
Piper
Preston
Strong
X6-88
72 Quests (This might not be all of them):
15 Main
17 Brotherhood of Steel
6 Minutemen
8 Railroad
12 The Institute
14 Misc/Sidequests
108 Perks:
70 Special
17 Magazine
12 Companion
9 Other
5 Vaults:
Vault 111
Vault 114
Vault 75
Vault 81
Vault 95
Plus - Vault-Tec Regional HQ
World map:

Map is twice as large as Fallout 3's, while being smaller by Skyrim's by a fair margin.