There are some big changes in here, including standard to hit rolls for both WS and BS. Interesting. Also of great interest is that you can see the toughness and strength stats of a few units, and see how many wounds we will have to be dealing with.
via Warhammer Community
https://www.warhammer-community.com/2017/04/25/warhammer-40000-unit-profiles/
One big change is vehicles. These now use the same profile system as everyone else. As you’ll see though, their stat lines are much above what you might expect from a standard infantry trooper. Wounds, for example, are not capped at 10, so don’t be surprised if you see larger vehicles like Land Raiders and Imperial Knights with dozens of wounds.
This means that there is no differentiation between monsters and vehicles, so you now have a standard system to compare between, for example, a Carnifex vs a Dreadnought. Speaking of Carnifexes, large monsters like them also have a lot more wounds now. There are also no Super Heavy Vehicle rules, as such. With the stats going above 10, the system is now an increasing scale, which means models that previously fell just shy of super-heavy status, the Gorkanaut for example, can now punch at the appropriate weight, and become much more survivable.
We’ve gained a Movement stat in exchange for a Initiative stat. With charging units now striking first, movement and co-ordination of your assault army becomes a big factor. You can also see that WS and BS are now standard rolls (Ballistic Skill sort of always was), though you can expect modifiers to both of these stats from in-game effects.
Strength and Toughness are still with us, and still use an opposing value principle (so much higher Strength will still wound on 2+, low Strength will wound on a 6+), and these aren’t capped at 10 any more either. Wounds is a big one. Expect a lot of models to get more of these. As you can see here, the Terminator has twice what he has now, and Guilliman has more too.
Don’t worry though – stuff still dies quickly, with powerful weapons dishing out multiple damage with each hit – but you will, as always, need to shoot the right gun at the right target to get the best effects.