Intel's x86S: A Proposed 64-bit Only CPU Architecture.
Intel has released a whitepaper and specification for their proposal on "X86-S" as a 64-bit only x86 architecture, which would require booting CPUs directly into 64-bit mode and removing legacy modes. Intel is still investigating the 64-bit mode-only architecture and hopes to solicit industry feedback while exploring it. Those wanting to run legacy 32-bit operating systems would have to rely on virtualization.