If we go with the theory that absolutely most of the value of ngtlds come from being .com hacks, then .web is certainly very valuable, as lots and lots of Keyword+Web.com domains are taken.
And they sell for high price too:
Domain Price Date Venue
siteweb.com 100,000 USD 2011-10-05 Sedo
bestoftheweb.com 45,000 USD 2006-10-17 Moniker
hindiweb.com 35,000 USD 2015-02-08 DomainNameSales
digiweb.com 25,000 USD 2009-09-25 Sedo
femiweb.com 20,850 USD 2011-03-23 Sedo
easyweb.com 20,500 USD 2009-02-05 Sedo
femiweb.com 15,000 USD 2011-03-15 Sedo
southernweb.com 13,750 USD 2013-12-18 Sedo
filmweb.com 12,500 USD 2010-02-26 Sedo
financialweb.com 10,600 USD 2006-01-24 SnapNames
medicineweb.com 10,500 USD 2007-09-26 SnapNames
chefweb.com 9,005 USD 2007-09-26 SnapNames
infoweb.com 8,865 USD 2009-02-12 NameJet
instaweb.com 8,824 USD 2015-03-30 Sedo
gigaweb.com 8,700 USD 2006-12-14 SnapNames
creatupropiaweb.com 8,500 USD 2011-02-10 Sedo
3dweb.com 8,100 USD 2011-01-07 Sedo
servicesweb.com 8,000 USD 2011-06-20 Sedo
studyweb.com 7,012 USD 2014-07-18 NameJet
jvweb.com 7,000 USD 2015-02-08 DomainNameSales
247web.com 6,900 USD 2014-01-19 Afternic
webwebweb.com 6,900 USD 2008-11-20 Afternic
geekweb.com 6,000 USD 2011-06-04 Sedo
tcaweb.com 5,988 USD 2012-03-07 Afternic
tanzaniaweb.com 5,500 USD 2013-03-18 Afternic