Microsoft Origami (2006) [video]
youtube.com
youtube.com
I always wanted tablets to be small PCs, not big phones. The whole mobile thing strips them of most of their productive potential, as they have most apps thought for quick glances and activities (social networks, feed readers, small games) rather than something that might take a considerable amount of time to do.
Thankfully there are exceptions in both fully tablet-oriented apps (just look how well Frozen Synapse works on Android tablets) and, as of lately, x64-powered tablets that can run intensive desktop apps.
Here's a photo of.. 9 years ago(?) of me running Halo on a Samsung Q1 ultra (on Windows XP!) https://s3.amazonaws.com/f.cl.ly/items/1C3n3Z3F0o0w3f3L2N1q/...
It had a weak CPU for the time (Celeron 1Ghz single core or worse) and bad battery life, but featured some pretty quirks (mouse could be controller either via the resistive touch screen or an analog stick on the side, also arrow keys are mapped to a dpad, pretty handy for gaming I guess?) which I hoped would set the future for tablets to come, but they failed miserably, and now we're stuck with laggy capacitive screens covering the whole device with no decent haptic feedback whatsoever.
They are more on the right track now, but it's not in their DNA yet.