Whether it's worth it or not, is entirely up to you.
For a not so power user, it's definitely not.
The Exynos 7420 is still very powerful and smashes the SD810 in some places as well.
The only main reasons to go for a S7 would be if you NEED an SDCard slot, a better battery and IP68 certification.
I didn't need any of those, I bought an S6 edge plus instead of the new S7 even though the price difference was negligible, however I preferred saving those few extra bucks since the S6 series are far from 'outdated' or 'laggy' as some people call them.