"Will we see 10TB desktop drives? El Reg does not see any obstacle to that, beyond a marketing assessment by the WDC market bean-counters."
Basically, the answer is, "Not yet." The consumer sphere is still getting used to 5TB drives (mostly external), and these usually come with the caveat that writing this much data at once raises the risk of silent corruption so should be used with care (I use dedicated copying programs like FastCopy that default to write-and-verify to help prevent this).
Anyway, this stuff is pretty much cutting edge rust tech, so the price tag is going to be high and the demand restricted at this point to applications that really, REALLY need a lot of data in a small amount of space. I suspect consumer drives will see shingling tech before helium tech (as in the consumer sphere, large drives tend to be used for bulk storage and other offload-type applications where time is less of an issue than capacity).