kansasboy001 :
I agree, AMD has been very sneaky with releases lately, with their additional funds form MS and Sony, they have the funding to put in to a big release. Amd also hired two of the best CPU Architects in the market, (I forgot the names). If I remember right they did something similar when The released Athlon 64 and beat the crap out of Intel's CPUs.
They have hired a plethora of talent:
John Gustafson - Father of "Gustafson's Law", former Intel employee, GPU compute expert. (Chief Product Architect GPUs at AMD)
Raja Koduri - Ex Apple employee for GPUs, ex ex AMD employee for GPUs/Drivers. (VP of Graphical Solutions at AMD)
Jim Keller - Ex Apple employee for A5-A7, ex ex AMD employee, architect of K7/K8 and HTX. (Chief Product Architect CPUs at AMD)
With those guys working on this, I don't foresee an issue with them putting out phenomenal product designs. What I do see, right now, is a fab issue. 28nm FD-SOI @ GF via STMicro's designs is only just beginning to ramp. Yields won't be good for a while yet, until it's mature, and AMD has had to eat costly low yields @ GF before. I think if they do a 28nm FX type CPU, then it will not be until the process is mature enough to support a ~280-300mm^2 die size with moderately good yields. That may be 6-12 months out, depending on how the yields for the process go with the IBM processors that GF is producing. If the yields work out well for the POWER8 stuff, then AMD may dive into the pool.
This is particularly true of the position they took using bulk. It is far easier to port from bulk to SOI than it is to go the opposite direction. This is because the process for bulk requires more masking layers to perfect, and SOI removes a great many of those, so it is essentially "easier" to produce. The designs don't translate across 100%, though the portability is probably close to the 80% mark.
I also feel that they are holding something back, hopefully I can get a good, solid answer from AMD in the AMA. Though, I somehow think that it will be sidestepped by NDA's and other methods. At least if we prod them enough about what the FX successor will be, they will see the massive interest in the product.