I mean, yeah, some of it is because a lot of games got pushed back to 2015 (looking at you, Witcher 3 and Batman), but sweet mother Teresa on the hood of a Mercedes-benz, 2015 could be (assuming we don't get more delays) the best year in gaming of the last decade.
Just off the top of my head, here's what we are getting in 2015.
The Witcher 3: Wild Hunt
Bloodborne
The Order: 1886
Uncharted 4: A Thief's End
The Legend of Zelda Wii U
Halo 5: Guardian
Metal Gear Solid V: The Phantom Pain
Xenoblade Chronicles X
Batman: Arkham Knight
Persona 5
No Man's Sky
Tom Clancy's The Division
Star Wars: Battlefront
Rainbow Six: Siege
Just Cause 3
Resident Evil: Revelations 2
Quantum Break
Yoshi's Wooly World
Kirby and the Rainbow Curse
Monster Hunter 4 Ultimate
Tearaway Unfolded
Ratchet and Clank Redux
Dark Souls II: Scholar of the First Sin
Star Fox Wii U
The Legend of Zelda: Majora's Mask 3D
Resident Evil REmake HD
Severed
The Tomorrow Children
Rime
Everybody's Gone to Rapture
Hotline Miami 2: Wrong Number
Firewatch
Overwatch
Star Craft II: Legacy of the Void
Pillars of Eternity
Assassin's Creed: Victory
Yakuza 5
Mortal Kombat X
Tales of Zestiria
Final Fantasy Type-0 HD
Final Fantasy XV: Episode Duscae
Codename S.T.E.A.M
Splatoon
Rise of the Tomb Raider
And those are the biggest I can think of, not even digging into all the Indie craziness going on like Hotline Miami 2, Adr1ft, etc. And the games not announced yet. There's also re-releases like Dark Souls II: Scholar of the First Sin.
Obviously, some of them could be disappointments or broken messes (God knows we got those a plenty in 2014), or delayed to 2016, but there's still plenty of games to make this an insane year.
And hey, while Final Fantasy XV is not sure to be released in 2015 (I mean, this is Final Fantasy XV after all), we're gonna at least play a part of it soon.
Bolded what I'm interested in. Don't forget the FFXIV Expansion, it's basically a new game if you are going to include an FFXV demo in your list. Overall, I am way more excited for 2015 than I was for 2014.