Galaxy S8 will be all about design, well mostly. Samsung has kicked out the home button and used the extra space to expand the screen, keeping the same form factor
I've owned an S4, S5, S6 and S7 Edge and was quite used to the home button being in the front. I got a LG V20 in December and I have to say, I really like having the fingerprint reader in the back now. It takes a little getting used to but I find that it is actually better. I think you guys will get used to it.
From the schematics, it looks like they put it to the right of the camera! That's a horrible spot IMO. It should go under the camera in the center to accommodate left and right handed folks.