Well, I already have a gaming PC, a Wii U, and a Vita.
I wont be upgrading my PC for a while. I'll see what Nvidia does with Maxwell/800 series, and AMD with Volcanic Islands/8000 series. I'd rather not upgrade my GTX 680 (which is still selling around $450-$500) until I get at least a 50% performance boost, and from the look of things, the GTX 780 will only be giving me a 20%-30% boost at best, which isn't enough to justify the $650 price tag, IMHO.
I'm happy with my Wii U. I got it because out of all the console exclusives, Nintendo has my absolute favorites. Monster Hunter 3 Ultimate has been an absolute blast so far, and ZombiU is pretty spiffy as well. Things will only get better once TLoZ wind Waker HD, Pikmin 3, MonolithSoft's 'X', Smash Bros, etc. etc. etc. all release.
As for the Vita, I'm a little less satisfied with it than I am with the Wii U, but I still enjoy having it. Having access to PS1, PSP, and Vita games all at once is pretty damn awesome, especially for playing JRPG's on the go.
So, in summation, I voted books.