Yes for me 2K is QHD or 1440p. It just easy for me to compare display resolutions for example 0.5K for 720p, 1K for 1080p, 2K 1440p, then 4K, 6K, 8K, 16K, etc [1]. Buying laptop with less than 1440p display today is just beyond me.
They are many 1 kg laptops around at the moment by most of laptop manufacturers. For GPU personally I have an external GPU or eGPU via Thunderbolt interface.
Currently they are many laptops 128 GB RAM around, they just need to put it in a lighter laptop based on i7 or i9 [2]. Heck even the cheaper Intel's 10th Gen Celeron CPU can support up to 128 GB RAM [3]. It is not a rocket science to put 128 GB RAM inside a lightweight laptop today.
[1] 720p vs 1080p vs 1440p vs 4K vs 8K – Which Should I Choose?
You are using that display terminology differently from everyone else. 2K, 4K, etc. refer to horizontal resolution, and 720p, 1080p, etc. refer to vertical resolution. 0.5K would be something like 512x384, an ancient resolution lower than VGA (I used it sometimes in the 1990s), and definitely not 720p, which is 1280x720. 2K, 4K etc. came from cinema and filmmaking, but 720p, 1080p etc. come from TV and computers; the "p" stands for "progressive scan", contrasting with "i" for "interlaced" (a lot of HD TV broadcasts are 1080i).
They are many 1 kg laptops around at the moment by most of laptop manufacturers. For GPU personally I have an external GPU or eGPU via Thunderbolt interface.
Currently they are many laptops 128 GB RAM around, they just need to put it in a lighter laptop based on i7 or i9 [2]. Heck even the cheaper Intel's 10th Gen Celeron CPU can support up to 128 GB RAM [3]. It is not a rocket science to put 128 GB RAM inside a lightweight laptop today.
[1] 720p vs 1080p vs 1440p vs 4K vs 8K – Which Should I Choose?
https://www.displayninja.com/720p-vs-1080p-vs-1440p-vs-4k-vs...
[2] Top 10 Laptops with 128GB RAM:
https://www.reinisfischer.com/top-10-laptops-128gb-ram-mobil...
[3] Intel® Celeron® Processor G5900:
https://ark.intel.com/content/www/us/en/ark/products/199268/...