What benefits will software developers see from Suns investment in the x64 architecture (AMD64 and Intel 64)?
Having an optimized 64-bit implementation of Solaris for the AMD Opteron and Intel Xeon architectures opens up the possibility to build new applications exploiting the linear 64-bit address space—something that had previously not been feasible on 32-bit x86 systems. In addition, the 64-bit kernel has guaranteed compatibility with existing x86 32-bit binaries.