Depending on what your enough is. The Skylake one wasn't a huge boost, this new one claims 20% faster CPU and a 50% faster SSD, so it adds up to a fair boost over yours. But imo still not enough to move unless it's also upwards on the processor tiers, i.e you had a 2015 M3 and are moving to the 2017 i7(lolIntelitsstillcoreM).
*edit* sorry, I misread the original post, so my whole reply below is about the previous MacBook Pro, vs. the new MacBook Pro - not the MacBook that was in question.
Keep in mind that CPU bench shows 20% improvement in speed but that's in part because they apparently benched 2.9GHz CPU vs the old 2.7GHz. I think previously 2.7 was the base model, while the new base model is 2.8, not 2.9, so I think the improvement in the same price bracket is probably more like 10%?
Also, I don't see any such SSD speed improvements? The old one had 3.1GB/s max read speed / 2.1GB/s write speed. The new one is 3.2 / 2.2.
As for GPU, we were thinking that 560 would have 10-15% improvement vs the older 460, but the improvement is practically next to noting now that AMD revealed the specs. The 460 was 1.86TF, the 560 is 1.9TF. A total of 2% improvement.