But "Enterprisy people" like web for mostly 2 reason:
1. it's "multiplatform" (you know it work on the 2% of mac and 05% of linux, and on iPad and smart phone, which are more common)
2. it's non brainer deploy once in on a webserver it's out there for every one, and that's the latest version!
For the update of desktop always a problem (you see, in some entreprisy environment, user CAN'T install anything, including update, the likely mandatory .NET framework, etc.) click once does a relatively good job in most case for .NET app and, on WIndows 8, metro app update seemlessly! (although there are curretnly some nasty limitation for .NET business app, like crippled file access, nosql access, this can be handled on the server side as, thankfully, WCF work in metro app!!)