[einpoklum]

Unified memory is just _different_, not above or below. It offers on-demand paging. But that comes at a cost (at times) in terms of memory I/O speed.

[my123]

It's a feature tier above, with much more emphasis on ease of use from the programmer's perspective.

It also allows for significantly more approachable programming models. For example: https://developer.nvidia.com/blog/accelerating-standard-c-wi...