Hi KCM,
Browser-enabled requires SharePoint which is typically installed on a server. It wouldn't make sense to install SharePoint on laptops. Much cheaper to install InfoPath. By the way InfoPath rich client is less expensive up to several hundred "seats" so you're better off buying the rich client if you have less than 250-500 users (range because depends on concurrent users). How many users do you have at home? If it's less than 500, you're probably better off having them install InfoPath (assuming they aren't on Macs).
Web Service is used to submit data from client laptop computers to the cloud (or to a server on the Intranet or Internet). If you don't have connection to the internet, Web Services won't matter. Web services run on servers. For the same reason that SharePoint runs on a server, Web services do too. In fact, SharePoint is basically a collection of Web Services plus a bunch of other goo for rendering web pages.
Hope that helps more!
:)