It isn't the question of popular, as much as it is a questions of marketing. New gTLDs are not having a too easy of a time getting high rankings from search engines, but on the other hand it provides for a more interesting branding, which contributes to your marketing campaign. MYNAME.hosting certainly sounds cooler than MYNAMEhosting.com or .net, in spite of latter probably getting higher marks in search engines.
Do you see a lot of companies using or switching to .hosting? That probably serves as the answer to your question.