Display
The display did not change. The 13.3-inch screen still has a resolution of 2560x1600 pixels, which results in a pixel density of 227 PPI. The Panel-ID is APPA034 and is therefore identical to the 2016 model without the Touch Bar. The maximum luminance in the center is 551 nits and the average result is still very good at 514 nits, which surpasses Apple's claimed 500 nits. That the contrast is still "just" 1148:1 is a result of the slightly increased black value (0.48). The battery is reduced on battery power, because the center value drops to 502 nits. However, this result easily surpasses the Windows competition.
Performance
The MacBook Pro 13 with the Touch Bar is once again the more powerful model out of the two 13-inch systems since Apple uses dual-core processors with a TDP of 28 watts. This is an advantage for the GPU in particular, because the higher consumption limit gives more headroom for the Turbos of the two components. However, you should not expect a revolution from the Kaby Lake generation, because it is only a small update compared to Skylake.