Many titles surprisingly work at 1680x1080 res, some work on higher textures others on lower but the APU delivers playable FPS on many mainstream titles. BF3 is capable of low-med settings no tessellation or anti aliasing and being playable. Another feature is the liquidity of frame latency which is massive at 35ish FPS it still is smooth.
Discrete GPU performance, in many metrics plays withing 2 FPS of a i3, others matches and a good few can actually beat a i3 where optimized for better core usage, on a pure GPU orientated front the A10 is a perfect match up in discrete performance. Where it falls behind is in CPU bound games but either way you will still get high FPS, at a budget maximum FPS is out of the question anyways so 80 or 100 FPS is not really going to affect it much.
The other bonus of the FM2 platform is high end features on a budget platform, take a ASRock A85 Extreme 6 in my sig, 8 SATA 3.0 ports, 6 USB 3.0 as well as support for 2 more with the connector and a connection port for chassis USB 3.0 support, also 2 USB 2.0 ports. It supports eyefinity without the need of a discrete card and it has 8+2+1 Phase control VRM's which is what you see on a AM3+ ASus Crosshair V motherboard which is the highest end AMD motherboard, add Wi-fi to the mix at under $100 you get a high end feature rich setup that can game with or without a gpu at little over $230.
Trinity is not a performance king its a king of budget performer and does so with swagger.
PS: by budget its what it implies, do not expect the iGPU to max out sleeping dogs with full eye candy or any other demanding title, but you can achieve playable frame rates at low med settings in many titles.