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Cost vs. Benefit for Caching Appliances

Gary Orenstein at Gear6 sent me preview material with his press release for CACHEfx appliance launch.

I guess writing nice things about vendors once in a while has some benefits. May be, I will be crawling into doghouse, by the time Gary finishes reading this post. :-( But, somebody got to ask the hard questions.
Gear6 Unveils Industry’s First Terabyte-Scale Caching Appliances to Accelerate Data Intensive Applications

CACHEfx appliances support a baseline of 250,000 I/O Operations per Second (IOPS), 16 Gigabits per second of throughput, microsecond response time and scale linearly to handle millions of IOPS. The Reflex OS™ virtualizes appliance memory into a scalable coherent cache pool, optimizes data delivery through parallel I/O channels, and provides robust intelligent cache services.

CACHEfx centralized storage caching solutions are available now starting at $400,000.
My jaw dropped after looking at starting price tag of $400,000. My first reaction was "Damn, this thing is expensive!" The performance stats like 250K IOPS and 16Gbps throughput are impressive but let's be realistic how many customers can afford to pay $1.60 an IOPS to speed up applications, beyond hedge funds and stocks/options traders. I am looking forward to a ROI/TCO justification in near future.

How big is the market for caching appliances anyway? I hazard to guess that $1.6 an IOPS eliminates most web companies with intensive data access performance as well as a large portion of HPC market.

When and where can caching appliance threaten the parallel and clustered storage solutions?

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