Sony is making steady advancements in the global shutter with CMOS sensors. A bit harder on DSLRS with larger sensors and more pixels to read but the smaller sensors with smaller megapixels already have them [1].
So it's matter of a time that most CMOS bases videos will be free of rolling shutter, starting with higher-end video cameras that have sensors with just enough pixels to cover 2k-4k videos [2]
[1] http://www.sony.net/Products/SC-HP/new_pro/december_2013/imx...
[2] http://www.newsshooter.com/2014/09/11/io-industries-4k-super...