It's worth it! Obviously most 2016 owners are butthurt and won't give you the right advise.
My 13" Touch Bar 2017 is exactly 13% faster in Geekbench 4 and I get exactly 79 mins more battery life by looping a movie in ITunes until the machine turns off! I tested this side by side with my 13" TB 2016.
What will you do next year? There will be similar or better gains to have next year as well.