Nevertheless, Google IS a calculator. Is it only a calculator? No, it is also an online shopping junction, dictionary, web search engine, etc. Google is capable of doing anything within the range of elementary mathematics. Even if you try to scare it off with the integration sign and the matrix models, a few websites capable of being accessed by Google will suffice in handling those.
If Google "replaced" calculators, it is already one. If we inject a chip into our brain resulting in us being superpowered and can calculate even the most complex definte integrals in miliseconds, we are calculators then. It is not calculators themselves entirely that are being replaced, only the older generation with the newer gen.