This is fully dependent upon the class of graphics card desired.
As far as low-end ... they are present and used, just not to the extent Intel is present.
Mid-range however is where the money is in these matters and it's highly likely and possible that Vega can most deffo compete in this area without much issues.
High-end ... yeah very likely ... but the market on laptops with 1070/1080 class of hardware is tiny in comparison to 1050/1050 Ti/1060 class.
And if you can get such a capability integrated instead of separate... that's a huge cost saving, design complexity reduction.