...and here is mine - perspective I mean...
I have a SP4, which is my main computing device and I use it 95% of the time as a laptop. At my table, it is connected via the Surface dock to two external monitors (sometimes 1), two external HDDs.
But I also have a S3 (not the Pro). I've had it since the month it was first released in the UK except for a week - last week in fact - when it slipped, fell and the screen cracked... but I replaced it with a (luckily) new S3.
I don't have the S3 KB - never did. I use the Stylus that came with the SP4 with the S3. And, the S3 is my primary tablet and digital notebook. In short, I use it as a pure tablet. I have to read a lot of documents and annotate them and the S3 is amazingly effective for me. It has also made me mobile where my work is concerned.
So, sometimes I find myself at some place (say a cafe). I have the Sp4 on which I would be typing; the S3 which I would be using to refer to locally saved and online materials; both tethered to (till recently a 950XL) my phone (Moto Z Play), on which I deal with messages, and a few low key social media services. OneNote, One Drive Outlook.com and Office 365 ties in everything relatively well.
So, 2017, S3? Well, I would say yes. My reasoning is that (1) With WoA coming up later, it is very likely MS will have to release a Surface device. This is unlikely to be the mythical Surface phone. More likely, it will be a Surface - fanless. Much will depend on the screen size. Anything more than the S3 (10.6 inches, isn't it?) would make it too unwieldy.
If this happens - IF!! - then earliest would be Fall this year. In the interim, the Galaxy Tab 10.6 and the iPad Pro are too expensive for me. The S3 - in 2017 - works much better...for me.