450K + Apps, please. Surface Pro doesn't really need "apps" because it can already run the millions of Windows programs that Windows XP, Vista, 7 and 8 can run. You dont need the "apps" because you already have the full fledged programs that run on Windows. Why would you chose to run a bastardized version of a program on an iPad when you can run the full software with all of it's capabilities on a Surface? 4G LTE issues, nonsense, plug in a 4G LTE dongle to the USB port and good to go, or connect to your phone's hotspot. Finger print access issues, nonsense, plug in a Targus or other mfg fingerprint reader to the USB port and good to go. Try opening any office doc residing on a file server, from the iPad, making changes, and saving it, not as easy, iOS isn't capable of doing that natively; You first need to find an "App" that has all the features to download the document to the iPad, then open, edit it, save it, and then re-upload to the server. On the Surface, it works just like your desktop or laptop, open, edit, save, close, you dont need to use a cloud service or google docs etc to make it work because the Surface works just like your deskpot and laptop, you can even use the good ol' drag and drop. i had a user who used a laptop in the office and a tablet (iPad) when in the field (for portability), now both devices have been replaced by a Surface Pro 3, has full access to our file server and internal network, didn't work as smoothly on the iPad; and best of all, i have full control of the device through Active Directory, can't say the same about the iPad.
Comparing the Surface to an iPad is dumb, unless all you want to do is compare the hardware specs. The Surface is a full fledged computer, but in tablet format, the iPad is simply a tablet that runs a bastardized version of its parent OS. If Apple could take their full OS and put that into the iPad then yes, you could compare the two the way Macs and PCs have always been compared, but in their current stage you can't compare the full version of Windows OS to the bastardized iOS.
"Apps" are handicaped versions of a full program that can run on Unix, Linux, Macs or Windows there is no comparison between the full version and a broken down versions found in iPads and Droids.