WiiU has had a rough time. Some think it might be Nintendo's last console, as it's fared so poorly. They tried to recapture the lightning in a bottle from the Wii, and made a lot of missteps. This could impact longevity and future software support.
The PS4, OTOH, has been one of the fastest-selling consoles of all time, vastly outperforming expectations. It's a solid, gamer-centric unit which has had a stellar reception. The software line-up for 2015 looks amazing. Given it's Infinity 2.0 support, I'd recommend going that route.