The likelihood of any non-bootloader unlocked device attaining root on lollipop is highly improbable and more likely than not, will not occur. It's not impossible, but highly improbable due to the way Google has finally locked down it's OS to close serious security vulnerabilities that, as of today, makes Android the least secure OS on the market with very little protection for the end user from malware and malicious code.
If you want root going forward, you need to buy a bootloader unlocked phone, such as the Nexus 6 [NX6], which is the first hot-swappable phone you can use on Verizon one month and AT&T the next. I'm not going to go into why root on Android 5.0 ]Lollipop] will likely not occur, as I've made this same point on numerous threads, so if you want to know, look up ChainFire's post on Google+ around the 18th of October and the one he made a week prior which give users an adequate and highly technical explanation as to why rooting non-bootloader unlocked devices on Android 5.0 and beyond is probably a thing of the past and will not occur.
Again, I cannot stress this enough... If you want root and it is important to you, you need to buy a bootloader unlocked device (the Nexus 6 is your best bet as root will occur as soon as ChainFire receives a few files from it). If you do not, you have a 99.99% chance of remaining unrooted on Android 5.0+ until you buy a bootloader unlocked device.