And that is why the new gTLDs will succeed. They are different and fresh, different and fresh attracts attention. Different and fresh isn't boring.
Obviously the definition of success varies a lot from one person to another.
For example .cars Registry COO Mike Ambrose said that .CARS .CAR .AUTO (3 extensions combined)
surpassed his expectations, reaching over one thousand registrations after a few months.
If new extensions are so good, why don't end users embrace them on a large scale ? What's the hold-up ? They can have them now from their favorite registrars.
I think there is one huge problem that is underestimated: there isn't critical mass in new extensions. Consumers don't pay attention and mindshare is nil.
.com and ccTLDs have momentum, they have volume and they are ingrained in the minds of consumers. I would take decades for new extensions to catch up, if they were performing better. But they are lagging. So the gap is widening. End result: new extensions remain marginal oddities.
Back in the day, .mobi was getting traction from prominent end users, it was advertised and it died nonetheless because the momentum could not be sustained. Yet it got exposure that no other new TLD ever got (not even .co). What do people expect ?
3 years on, we have hundreds of new strings, millions of new domains added to the root (boosted by zone stuffing, cheapies and freebies). We have some volume but it's not critical mass, it's dilution.