Lenovo Ideapad Yoga 2 Pro
Steam crashes trying to run games complaining about missing i965 module. It seems some applications treat it as accelerated, and some do not.
You can easily rotate screen with xrandr, however it does not rotate touchscreen/touchpad input which makes it fairly awkward to use. There is a project attempting to address this. Keyboard hardware-disables in tablet mode, but touchpad is still active which needs to be addressed. No ACPI or keycode signals appear to be emitted for the various laptop,tent,tablet states.