I completely agree that 2015 looks like it's going to be an amazing year for gaming however I completely disagree that PS4 has the best lineup of the bunch. It's lineup is great but so are the other systems. 3DS looks good. Vita looks good. XB1 looks good. WiiU looks good. Even both PS3 and 360 look good. It really will come down to personal tastes and preferences.
Personally most of the games I'm really anticipating this year are exclusive to WiiU and 3DS as I highly enjoyed Xenoblade Chronicles and Xenoblade Chronicles X looks to be an even bigger and more epic experience then before, Splatoon looks to be a new take on shooters, Legend of Zelda for WiiU looks to be amazing, Monster Hunter 4 Ultimate is a huge upgrade to a series I highly enjoy, Mario Maker is something I can see my friends and family getting around and playing regularly, and Codename S.T.E.A.M. looks like it's going to be right down my alley, and there's quite a few others. That said, these aren't the only games I'm really looking forward to, Witcher 3 looks freaking amazing, Metal Gear Solid V is something I can't wait to play, Batman Arkham Knight looks like it'll be exactly what I want from the series, and One Piece Pirate Warriors 3 is going to be right down my alley, and there's quite a few others. Again, it really comes down to personal tastes.
As for the original post though, many of the games listed there as exclusives actually aren't PS4 exclusives.
Samurai Warriors 4-II - PS4, PS3, Vita
Grim Fandango - PS4, Vita, Windows, Mac OSX, Linux
Senran Kagura: Estival Versus - PS4, Vita
JoJo's Bizarre Adventure: Eyes of Heaven - PS4, PS3
Yakuza Zero - PS4, PS3
Toukiden: Kiwami - PS4, PSP, Vita
Godzilla: The Game - PS4, PS3
Journey - PS4, PS3
Hellblade - PS4, PC
Tearaway - PS4, Vita
God Eater 2 - PS4, VIta, PSP
The Witness - PS4, Windows, iOS
Dragon Quest Heroes: Yamiryū to Seikaiju no Shiro - PS4, PS3
One Piece: Pirate Warriors 3 - PS4, PS3, Vita, Windows
No Man's Sky - PS4, Windows
Yes, these games listed are going to PS4. No, they're not exclusive to PS4. Yes, PS4 does have some awesome looking exclusive games. No, PS4's list of exclusives is as extensive as you think it is. Yes, PS4 has some really good looking multiplats. No, PS4 isn't the end all be all. The good news is this gen there's plenty of choices on what system to get awesome experiences on and this year is going to be an awesome year regardless of what system you own.
