It's the age old performance per price argument delivered in many forms and disguises over and over and over again! Meanwhile, Intel is posting record profits while the "value" manufacturer is failing to meet financial targets. Don't get me wrong, I'd rather see the 9900k at $399, and I'm as big an Intel fanboy as they come. Intel marketing, in their infinite wisdom, think it's worth $488, and they may have just called it right based on the overwhelming positive response from those who would actually consider this chip for their gaming and other needs. The 9900k, with 5GHz (dualcore) turbo clocks, and 4.7Ghz all core turbo clocks is right there in the mix of HEDT conversations and has effectively blurred the lines between desktop and HEDT. This is its main appeal. I've read many posts online of users lamenting their desire to go HEDT but lamenting the relatively lowly clock speeds of the parts in that segment, save for the more expensive apex Intel chips like the 7980XE. That conversation may still be ongoing for some but for many others, their desires have already been met with the release of the 9900k. It dominates everything on desktop at few threads or many threads and also brings 16 threads into the HEDT fight. Is it for HEDT? NO. Is it for everyone? NO. Is it the fastest desktop chip? YES. Will it fit well in the HEDT segment as well? YES.
The number one sin of the 9900k is that it may be too fast for its own good; it's actually faster than ALL HEDT chips in certain HEDT benchmarks, according to the AnandTech review. But that is not to confuse this chip with an HEDT chip. Intel already has an octalcore chip for the HEDT segment in the 7820x, which debuted over 18 months ago. It's priced at $599 and offers up to 128GB RAM support, 28 PCIE lanes and QUAD channel memory support. This chip has been available, along with many other HEDT chips from both AMD and Intel as upgrade options for enthusiasts. If your workload is largely HEDT you've always had choices. Same for the desktop. What this chip brings to the table is that it completely dominates one segment and does comparatively very well in the other; all for $488-$500, and for that it has no equal. The $500 Ryzen 1800x tried to fit this niche 18 months ago but lacked the clocks or the grunt to be successful at it. The 9900k will fill this spot for the foreseeable future.