Yes, them coming to the graphics market is a great news! Asrock always been very competitive and innovative, which means other brands will have to drop their prices if they want to compete. I don't see any Vega cards yet, but hopefully they will also carry Vegas, it's a great card if you have a...
I'm pretty sure that any AM4 has to be capable of at least running at stock clocks any AMD CPU, even R7 higher end.
What I would doubt is the overclocking stability and or the long term health of the motherboard.
I would rather go for the i5 and overclock it using a good motherboard.
You will be fine running any games with the high end i5 with some decent overclock on it.
But for overclocking I would opt for Asrock instead of MSI.
PCPartPicker part list: https://pcpartpicker.com/list/GjQN2R
Well, not sure about if he will be gaming 1080p in 7-8 yrs.
I believe the graphics and gaming will be exponentially better in the next 5, with the VR and the 7nm coming.
Which will make anyone game at 1080p, un attractive option :D
For the price difference, if you don't see any more benefit getting the asus, go for the Fatal1ty.
Asrock builds great boards and generally they actually pack more for less.
Not to mention the quality build is pretty good and generally they are solid overclocking motherboards.