Life expectancy question

[Allywill]

Can someone clear something up for me? Life expectancy for men in the UK is quoted as around 80. Does that mean if you are born in 2021 you can expect to live (on average) to 80? My dad was born in 1938 and is now just short of 84. Is his life expectancy different I.e is it based on the year you were born? This thought came about because someone on another thread said 70 wasn’t elderly but surely the life expectancy of a male born in 1950 wouldn’t have been much in excess of 70? Or am I completely wrong in how I am viewing the statistic?

* 100 years from now, some of the babies already born this year will still be alive (assuming no global catastrophe), and benefitting from medical science which has advanced a century from today. If you think about how much technology and medicine has advanced since 1921, then who knows what body modifications and other treatments might be available in 2121? That would enable some of those centenarians to live until 200 perhaps.*

The research into genetic treatments is so rapid that some experts think, realistically, we will see a cure for most types of Cancers and age related bone / muscle / tissue loss (which causes a lot of hospitalisations) in 10 years. Whether that happens or not I don’t know but I do think people born in 1980 and beyond probably have a great chance of living healthily to 100.