While it is possible for view 3D models on a laptop .....having Datacad 3D drawing views (including O2c) work on a tablet would be phenomenal.
Here are some contenders ...
(any device that runs Windows 8 or Windows 8 Pro (not Windows RT))
Samsung ATIV Smart PC Pro
Microsoft Surface with Windows 8 Pro
Lenovo ThinkPad Tablet 2
ASUS Taichi 21
Sony VAIO Tap 20 'Mobile Desktop'
Sony VAIO Duo 11 Ultrabook
DELL XPS 12 Convertible Touch screen Ultrabook
HP ElitePad 900
27" Multi-User, Multi-Mode, Multi-Touch, Table PC