What's the effect on the CPU OCing? Can you lower the voltage of the uncore to reduce heat and squeeze so extra MHz from the processor?

remember the days of PC-66/100/133 SDRAM, lol

Good article Ilva.

At the beginning of the article you refer to "upcoming DDR2 SDRAM" and in the next sentence to DDR4 SDRAM. Is this correct?

Typical gamer's bias. Many Audio-related Desktops(DAWs) need to be completely noiseless to be placed in the studio or recording locations and its the ideal for mixing and mastering environments. In order to achieve that noise free systems, Fanless working components are VERY wellcomed.
Add recent efficient fanless PSUs, noiseless(and heatless) SSDs, undervolted (and already powerful) CPUs, together with low-voltage RAM (and here comes the trick) that produce low-heat could be installed in 0 dB fanless and still powerful systems.
Bear in mind that 12, 24, 32 Gigas of RAM can be easily used in multitrack enviroments and so temperature adds.

PC reviewers apparently are not aware of the size of this potential market, neither Audio system builders seem to have produced such noiseless set ups, publicly... yet.