RAID Storage Technology Outdated?
Before jumping at one article you should do a little research, after a short Google search "windows storage pools vs raid" I found this article which goes more in-depth. As far as I can tell this new tech doesn't completely replace raid but could be considered an alternative to raid ONLY if you are using windows server 2012. It also may not make sense if you already have the hardware to support hardware raid as (I'm guessing) using this new storage mechanism will increase the cpu/memory loads on your server since it has to do the storage calculations in software. So I wouldn't say RAID is no longer relevant, it just has some healthy competition.