Otherwise should we change the definition of "valuation" ?
Edit: it is difficult not to sound snarky on this subject. If a respected investor's first reaction is to see beyond the individual companies and into the whole (and I agree tech startups will produce billions of value in The next five years) that's good - but it reflects a jargon problem perhaps - if the sophisticated investor sees a group of billion dollar valuations and thinks I will invest in them all and come out ahead it is a different thought process to the layman - that a valuation of a billion means it is worth that much.
While we should allow for a degree of sophistication investing in startups, it is still a stretch of jargon to make Humpty Dumpty proud