You can write Metro/Windows Store apps in HTML/JavaScript, C# and C/C++ etc, and you can use Visual Studio 2012 or the (free) Express version. This is much more open and flexible than writing iPad apps and it's something enterprises already know how to do.
Also, you can immediately deploy the same app to tablets, laptops and desktops, which isn't the case with iPad apps.
>I see RT as likely to accelerate the adoption of platform agnostic web apps in enterprise.
I am specifically not advocating platform-specific applications.
Microsoft has essentially thrown away the reasons for enterprise developers to tie themselves down to the Microsoft platform. If that's the case, there's relatively little reason to tie themselves down to any single platform.
C# code does require some modification to be run in a WinRT context, but I'd say the likelihood of code sharing with an existing C# application is still significant.
Also, you can immediately deploy the same app to tablets, laptops and desktops, which isn't the case with iPad apps.