I believe it's Pinball Arcade, and licensed even if it doesn't proclaim Pinball Arcade anywhere on the box or the thing itself. It really doesn't take much more than an Android tablet's processing to work, especially on the relatively basic Gottlieb table simulations/emulations.However I would imagine even playing something that is bloody awful like pinball arcade needs more processing power than that. Also has to get to a 24 inch screen so it has to be running at maybe 480i at a complete guess.
Without a doubt if it was running Pinball arcade - it would have 'Pinball Arcade' on it somewhere knowing those guys, unless its completely ripped off which is also possible as its going to be made in china/Indonesia etc