...They could KILL the global "2 channel audio card" market (M-Audio, Tascam, ESI, Roland, etc.)...
all they'd ever kill would be themselves - and that's about it

you cannot sell a thing for $100 if one single part on it costs you $20 already.
such a card would have to be available in stores worldwide, produced and pre-financed in at least mid 10k quantities.
a few of the afforementioned competitors could easily dry out SC's revenues by beating any price for any given time.
product support would break down completely and the product would earn a horrible reputation within a couple of weeks.
last but not least 90% of the customers would probably have a hard time telling the difference to one of the recent hi-quality onboard audio chipsets.
I really wouldn't overestimate the numeric specs.
The real performance usually depends on
what is processed and how...
I assumed a basic factor of 10 as it's equal the floaring point performance ratio
it's also close to 5 times the clockrate and 2 times the data rate (w. SIMD).
That a real application will deliver a factor of 8 is perfectly reasonable imho.
Under any condition it's significantly more processing power than before and there's the important change that SFP 5 makes it easier to assign code to specific DSPs to avoid the 'micro delays'
cheers, Tom