https://www.techradar.com/reviews/alienware-area-51m-review

 "In fact, the desktop-class socketed components make the Alienware Area-51m a prodigious value, compared to competing laptops like the MSI GT75 Titan. MSI’s desktop replacement will set you back $4,199 (about £3,150, AU$5,900) at the top end, with weaker laptop hardware, and without the possibility of future upgrades "

Perhaps you want to see the benchmark on "mobile " RTX 2080 VS RTX 2060 Desktop VS " mobile" RTX 2060

https://www.notebookcheck.net/GeForce-RTX-2080-Max-Q-vs-GeForce-RTX-2060-Desktop-vs-GeForce-RTX-2060-Max-Q_9621_9556_9631.247598.0.html

Well not sure why they are saying that since there is a difference between 2080 Desktop, 2080 Mobile and 2080 Max Q...

https://www.notebookcheck.net/NVIDIA-GeForce-RTX-2080-Laptop-Graphics-Card.384931.0.html

The clocks on the mobile variant is lower than the desktop counterpart...

Which is why it's still cannot match PS5 GPU that equal to RTX 2080 Desktop. On top of that The specific UE 5  demo for  PS5 need to use a faster IO. PC can run it,  it just  need more powerful (faster) IO than PS5 one has (to overcome  latency problem, pipeline , optimization problem) on top of equally or faster GPU. 

In the future PC will have one , but in meantime no Laptop SSD has speed faster than PS5 IO.

I can agree with your second point until proven otherwise and I can obviously agree that 2080 mobile can't match 2080 Desktop. But I am going to wait and see before agreeing that a 2080 mobile can't match/beat a ps5 since that is no slouch... 2080 Max Q? Yea the Ps5 can beat that no doubt but mobile? I have my doubts based on how well it performs even compared to it's desktop counterparts.

Yeah, also don't forget PS5 are using RDNA 2 . RDNA 2 has gain more IPC performance then RDNA 1 (RX 5700 variant) . You need to consider that. On top of that PS5 has a lot and a lot of customization that is hard to compare directly.

You also need to check 2019 leak of PS5 dev kit "Gonzalo " benchmark that exceed RTX 2070 by far  and on the realm of RTX 2080 performance .  https://bgr.com/2019/06/26/ps5-specs-vs-ps4-benchmark-leaks-teases-massive-performance-gains/

That was using old GPU on the old devkit 

40fps or more on a laptop
30fps on PS5
Someone please explain this gap.

Yea I can certainly see it being faster than a 2070. It's things like Ubisoft saying AssCreed Vikings will run at a minimum of 4k 30fps on Series X and MS comparing Series X to a 2080 instead of like 2080 Ti with Gears 5 benchmark that has me doubting some of the claims when it comes to the GPU performance. Now neither of those are 100% solid obviously since we won't know how they will actually perform and look when they come out but it does give me reason to doubt.

I am not saying that ps5/Series X can't do it but I am going to need to see more upcoming games and how they perform.

Don't forget console API is less overhead then PC counterpart. Developer usually squish more power on console due  to its close environment nature (it's more easy to optimize on close hardware) . It means developer know the limitation of the close environment device and maximize the potential of the hardware. 

You cannot do that kind optimization and treatment  on GPU available on the market, because PC has many variation and combination run on the market, developer will not able to push that far. PC GPU usually relied on raw power instead optimization. 

That's why an equally power GPU to console  cannot directly compared, to many factor involving in the process. 

You need the same games running on the system and then compared, that also depend on the games, engines , driver etc. 

Double POST , bad Internet