High Density (500GB/1 TB) 1.8" SATA HDD form factor with 16GB internal SSD Cache

The last 1.8" HDD I saw was 320GB. Maybe they can be marketed toward  tablets/smartphones. I wouldn’t mind having 500GB of storage on my iPAD or Android tablet with the snappy speed of an SSD. SSDs are fast, but they are expensive and drive the cost of tablets high and limit the capacity of these devices forcing users to switch to cloud solutions. Then the use of the cloud becomes another bottle neck when the users internet is slow or limited which totatally defeats the purpose of using fast SSDs on tablets and smartphones.