Blu-ray releases that made you go "WOW"

[Katatonia]

Which Blu-ray releases made you go "WOW" when compared to their old DVD counterparts? Sure, many Blu-rays look great and are general improvements; but I'm specifically talking about major improvements by leaps and bounds.

Here's two from me, and DVD Beaver review links attached with screen comparisons:

The Longest Day Blu-ray. The film itself was released way back in 1962 in black and white. The DVD releases always seemed rather blurry, but the Blu-rays transfer is sharp as a tack and the contrast and black levels are infinitely superior. The DTS Master Audio track is also quite impressive from an older film such as this. And thankfully Fox chose to include all of the extras from the old 2-DVD release here.

The Boys from Brazil Blu-ray. Gregory Peck as a fervent Nazi! The DVD was released way back in the 90's, and looked pretty shabby in a letterbox-only transfer...recently even reissued by Lions Gate with new artwork. The UK Blu-ray is superior in virtually every way. The colors are much richer, the detail is a huge step up, the contrast and background detail is greatly improved, and the framing is wider and more composed on all 4 sides of the picture. The original Mono audio was never all that impressive for the film, but it's encoded at a relatively high bit-rate on the Blu-ray for more clarity. No extras beyond the trailer in full HD.