Highlights
Shadows
Whites
Blacks
The sliders stayed the same and do the same, they just renamed them and refined them.
Although at first glance that might seem to be the case, there really is a lot more to it than that. It wasn't just a sort of rebranding or renaming, more that they were replaced with significantly different tools that operate in relatively the same tonal zones but in quite different ways. LR3's Recovery for instance tended to flatten highlights and suppress details if pushed too hard and I would rarely go over 20 with it. Highlights, OTOH, enhances local contrast in the recovered highlights and brings out detail. In some images the harder you push it (to the left) the more detail you will find hiding in the highlights.
Shadows does more than just lighten the lower quadrant tones as did Fill. It also incorporates Laplacian Edge Detection algorithms to identify details and open them more than less detailed dark areas. Blacks is also now content aware and whereas Black in LR3 was an absolute 5 that frequently needed to be changed to fit the image, in LR4/5 the default 0 is a floating value relative to the image's native black point.
The biggest change is the new Exposure. In LR3 Exposure was a linear multiplier and if pushed too far would fairly quickly cause clipping and Brightness was on a curve. New Exposure combines features from both LR3 adjustments, and is a content aware / auto-adaptive curved adjustment that can do a considerable amount of midtone brightening without pushing the highlights to clipping.