I'm going to have to disagree with you on that. I had a Galaxy Note 10.1 and though it was a good device, it wasn't even close to being as good as my SP3. The SP3 is a great tablet as well as an Ultrabook. It has replaced both my Galaxy Note 10.1 AND a 17" Dell laptop.
As far as apps are concerned, if you are just wanting to Facebook, Instagram, Twitter, or read news feeds, then sure a Samsung or Apple tablet is for you.
Many people think that "apps" are nothing more than app-ified websites. There is some terrific software out there for Android and iOS that are far more than a front-end to a website. Boss Jock Studio for iOS has no equal on Windows tablets. Using MS Office for Android and iOS offers a more natural tablet experience than using the desktop version on a Windows tablet.
I'm not please in the direction (or lack of one) that Apple is taking with the iPad, so I've begun spending more time with my Android tablets identify software that will allow me to get things done.
If you actually want to get something done, then the SP3 is for you. The reality is that there are more programs/apps that will run on my SP3 than would run on my old Galaxy Note 10.1. I can run Photoshop, Lightroom, Office, as well as use it for Facebook, Instagram, and Twitter.
When Windows 10 is released to consumers at the end of July, we'll see even more improvements.
If running desktop apps on a tablet is a "good thing" in your opinion, then enjoy. As for myself, I've already had that experience back in 2000. The continued lack of touch-optimized Modern UI apps is what makes the Surface family sub-par tablets.
If the SP3 makes a "great tablet" (as in, using it without the typecover) in comparison to the Galaxy Note, then the Galaxy Note was probably overkill for your use cases.
As for "seeing more improvements" with Windows 10. That remains to be seen. From what I've seen on some of the previews, Microsoft has over-corrected and removed some of the tablet/touch centric elements... such as the Charms Bar.
That leads to the question of Microsoft's commitment to the Modern UI. They've essentially stopped trying to court software developers to develop native Modern UI apps and instead have begun promoting their translation technology that would allow iOS and Android developers to convert their apps over to Modern UI apps. Traditionally, that (translation tools) marked the beginning of the end for a technology.
Microsoft has recently pulled the Modern UI version of Skype...with no indication that it will return.
I was actually a fan of the Surface RT. I saw the value of it being different than the Pro. The benefit was in the Modern UI which was terrific for touch operation.
I own an Acer Aspire Switch 11. It's a terrific device. All of the capabilities of the entry level SP3 at nearly half the price. As a netbook... it's terrific. The active stylus is a pleasure to use with OneNote. But in tablet mode... ugh... all because of the lack of touch-optimized Modern UI apps.
To bring it back on subject... that is why there is interest in the Jide Remix (and my comment regarding installing Android on a Surface). Anyone (who isn't an anti-Microsoft bigot) acknowledges the world-class quality of the Surface hardware. There is no question about that. But for some/many, it is the lack of touch-optimized software that tarnish that hardware when attempting to use it as a tablet.