The newest iPad Pro is a tablet with a much thinner chassis than its predecessor. However, this is because it no longer has a headphone jack. The iPad Pro 2018 also has USB type C, for improved transfer speeds and maybe more. Hopefully, this will be worth living that dongle life.
https://www.notebookcheck.net/The-2018-iPad-Pro-loses-the-headphone-jack-but-gains-USB-C.354131.0.html