I remember one thread suggesting that the existence of a keyboard might denote the difference between a ‘small’ and ‘large’ device. I wouldn’t necessarily agree.

If you have a tablet that is larger than a laptop, I’d probably argue it’s not a ‘small’ device that can be used during takeoff/landing. Others might suggest the ability to hold a tablet in your hands when using vs. not on a laptop may be a difference.

That all said, Im not sure what the official regs say (and if it’s different on UA mainline vs. each UAX partner, each of which could be subject to different specific regs based on what they’ve submitted to FAA).

personally, I find it a bit ridiculous to be buying a secondary device for use on takeoff/landing (though I’m not sure if this device would be a second for you or replacing what you are using). I know we’re workahilics in the US, but can we not live without working on a device for the first and last 10-20 minutes of a flight?