It does need a lot of engineering but I wouldn't say it's being done on a friday afternoon. Raja was hired in 2017 and the product isn't being released until 2020. Intel has a ton of resources on top of already having existing IP. Think of Ryzen for example - Bulldozer was the building block they started off with - catching it up to Intel wasn't too hard because the team working on Ryzen already knows all the architectural deficits and what they need to do. Raja is going to look at what Intel has in the iGPU space, use what he knows about architectures from GCN/Apple and just build the differential parts up. On top of that Intel is going to throw him a budget probably twice what he had on AMD - which means he's going to hire a ton of engineers to help him do it. I don't think it's going to be a challenge for Intel to be competitive. Will it beat Nvidia/AMD? Maybe not in direct performance but i'm sure it will be price/performance competitive.