I also remember the 1e days and casters finding interesting uses for spells. However, just as often, I recall far too many arguments over what was actually possible with a spell, as many players would start pulling out the physics books to make a case... for *magic*. In your example, for instance, ice is actually a very poor conductor of electricity, and that stunt technically shouldn't have worked. And it's the plethora of ambiguous loop holes in spell descriptions which 3e moved toward eliminating. There was another blog or article which explains why multi-purpose spells can really hose spell choice and design.
But the mention of "siloing" from the quote above makes me think that creative, unusual uses of magic will possibly be *increasing* in the upcoming edition. I don't think 4e will be the death of anything, except some of the more cumbersome, nonintuitive and simple WTF aspects of the current game incarnation.