Exactly what my work started doing. They were issuing laptops and iPads to the VPs and directors and above. The VPs and directors wanted portability and functionality both devices offered but had to carry 2 devices. Now they started to issue SP4s and monitors and the feedback has been very good so far. The VPs and directors all love having one device they can do presentations on and then dock at their desk when they are done.
We are about ready to move onto Surface Pro 4s but we are running into a problem with the Enterprise edition of Windows 10 and 8 causing the Surface Pro 4 not to go to sleep properly and generating a lot of heat. Combine this with surface sleeves and bags and its causing issues. Our company along with others are working with Microsoft to fix this "hotbagging" issue as they call it. As soon as it is resolved i'm sure we will start deploying SP4s instead.