Welcome to a laptop battery specialist of the Sony laptop battery
By today’s standards the tablet was huge. I don’t recall the exact dimensions, but the screen was about 15 inches diagonal, and the whole device was at least 2 inches thick. It required a wired stylus for mouse action, and it likely had a battery like Sony VGN-CR battery , Sony VGP-BPS12 battery , Sony VGP-BPL12 battery , Sony VGP-BPS7 battery , Sony VGP-BPS7 battery , Sony VGP-BPS13 battery , Sony VGP-BPS13S battery , Sony VGP-BPS14 battery , Sony VGP-BPS15 battery , Sony VGP-BPS18 battery life measured in tens of minutes instead of hours, but it was a tablet. It looked surprisingly close to a finished product too, if IBM wanted to it could have released it. For all I know it probably did to some very exclusive customers with very deep pockets.
So, while Steve Jobs and company was playing around with Apple II IBM had already created the precursor to the iPad.