Back in 2017 I looked at the 7-inch Getac ZX70, a fully rugged Android tablet. Now it's back, with refreshed components and a recognisable exterior.
At 762g, the Getac ZX70 G2 approaches the weight of the lightest laptops -- but, of course, it's designed for use in demanding environments where it is likely to be dropped, have things spilled on it, and generally get mistreated. The target market is sectors like utilities, manufacturing, transport and logistics, and so it needs substantial protection. Hence the bulk and weight.
Getac ZX70 G2 review at ZDnet