I'm not sure where you deduce that I don't see intermittancy as a problem!
To my mind there are two ways this can be addressed (and both should be used). The first relates to scale of the renewables themselves. Intuitively (and this is supported by research in the UK and elsewhere) increasing the scale and distribution of wind/solar goes to addressing intermittancy issues - obviously there is a good chance that when the wind isn't blowing at one site, it probably is at another. This is no different to arguments for decentralised generation by any means - the more you have and the more distributed it is, the more effective it becomes. On a lesser scale this is what we're seeing with the uptake of rooftop PV -the impact on power generation requirements is obvious and growing.
Second intermittancy can be addressed by storage which is why this article interested me - any advance in storage technology must increase the desirability of such technologies as solar thermal.
I'm not sure how storage "defeats the purpose of renewables" and I'm definately not sure how increasing the efficiency of storage can be regarded as an inherently bad thing.
