Year 2100 and beyond

"Everything in this world is mortal".Yes, I know this is nothing I have excogitated,its known.
My mind swings between two extremes-past & future, swaying not my memories or anticipations but time and generations.I wonder whether past generations dating back to thousands and thousands years would have given thought to generations of futurity or swung back and thought about far ancestors.
Time just flies and generations come and go.There are innumerable people who have lived before us and we are aware of only few of them.Big name are remembered say-
Albert Einstein-1879
Aristotle-384 BC
Galileo-1564
but hoi polloi, all oblivion
Every life goes bare handed irrespective of status, intelligence or whatever factor runs ones mind.Despite knowing full well, one throbs for materialism..let me keep impertinent aside.
My unbraided mind(any one's in general) takes me to year 2100.My absence or anyone's living now in that year is indubious(..exceptions are there, say .002% make it to Guiness record). Being in the hypothetical state, I imagine how people and world would have been almost a century ago(2100-2007=97, almost 100) and how it would be 100 years down the line.
We are living now, none of us but only they will be living in 2100.Hope someone in year 2100 gives athought about us(a century ago)..World moves on and on..