Its been obsolete since the 386 - its dedication to backwards compatibility has held innovation in the software side of things back, and it is still designed around the same architecture which points to days where memory was expensive, and having everything done on the CPU was ideal. Look around today, its the only CISC architecture still actively developed, unless you somehow count Itanium, and that isn't nicknamed Itanic for anything other than its massive failure in the marketplace. ARM, MIPS and other RISC architectures have long overtaken the mobile market, and even today, if you compare the same class of Intel CPU to ARM and MIPS equivalents, the x86 produces about the same amount of output within a margin of 5%, but it consumes 30-40% more power and costs significantly more. Plus, x86-native architectures all seem to blow don't they?
DOS, WIndows and GNU/Linux were first designed on the x86 ISA, and they all share a common trait - they're horribly engineered masses of conflicting ideals held together with duct tape. Can't necessarily blame it on the CPU, but its funny to me nonetheless.
Anyways back to topic. I'm either going to find a RISC workstation to work with, or pretty soon the only modern workstation I'll be using is at work!