What a surprise.
A flash vendor suggesting disk will become less relevant? Wow. Didn't expect that.
When flash is cheaper per TB than disk then this will be true.
When the total cost of flash is less than tape, then tape will no longer be relevant.
All of this is a long way off, if it ever happens.
And that's the worst graph I've seen for a while. It's oddly linear, and there are no units on the X axis, rendering it completely useless.
These guys probably have a decent product, but if they sell it like this the only people who'll buy it are those who fall for the marketing crap. Which is probably quite a lot of people, admittedly.