Maybe, but it seems that many or most of these things are being built on spec, and that speculation may or may not prove financially viable.I suggest this is a different animal.
The dot-com bubble was caused by speculative investment in internet companies, fueled by a belief in future profits despite a lack of actual results. A big problem was betting on orders before fulfillment and requisite use to demonstrate functionality. House of cards...
The bubble was the disconnect between stock prices and real business performance.
In that respect, I find it to have eerie echos of the dot com boom, same house of cards.