I'd really hope we do live with 4kb pages forever. Variable page size would make many remapping optimizations (i. e. continuous ring buffers) much harder to do, so we would need more abstraction layers, and more abstraction layers will eat away all the performance gains while also making everything more fragile and harder to understand. Hardware people really love those "performance hacks" that make live a more painful for the upper layers in exchange for a few 0.1%s of speed. You could also probably gain some speed by dropping byte access and saying the minimal addressable unit is now 32 bits. Please don't. If you need larger L1 cache - just increase associativity.