Not a threat from Intel to AMD, why?
Since it is only a prototype, it is too early to tell if Intel's proposal is a good challenger.
Like a comparison between a barebone racing stock car and a comercial model.
AMD already has very good options for light laptops with good performance without breaking the bank. Why wait until someone releases, and reviews its models to see how good it performs?
My opinion is to wait to see how Intel's Tiger Lake performs ONLY if you need a laptop to work with Photoshop or Premiere or if you work with MacOS.