A good example of a traditional Tablet which I like very much is the 17 inches   ACER  Aspire Z3-700 computer hardware .  I look forward to one day whereby ACER would bring a  15.6 inches version or a  17 inch version of a  Tablet that look something like the   ACER  Aspire Z3-700 computer hardware  but with a much stronger INTEL processor , and a much stronger graphics hardware , has a built-in DVD-RW Player , has a built-in battery which can last slightly longer , has a SIM/nanoSIM/eSIM for  4G LTE/5G  connectivity and can operate like a  Smartphone ( can make telephone calls  to any landline telephone or any smartphone and can receive telephone calls from any landline telephone or any smartphone ) , and running Windows 10 Operating System or Windows 11 Operating System .  

With these hardware specifications, I believe a machine like this can be a  real or a true   " ALL-in-ONE "   PC .  

With these hardware specifications , I also believe a machine like this can qualify to be  a   real or a true                                                 [ Laptop/Tablet/Smartphone ( ALL-in-ONE ) with    built-in DVD-RW Player ]  machine  because this machine can operate like a  Smartphone ,  because this machine can operate like a  Tablet  and  because  this machine can operate like a   Laptop    ( when connected to a   wireless/bluetooth   keyboard  and   a   wireless/bluetooth   mouse   the  Tablet  behave like a   PC/Desktop/Laptop ) .    

With these hardware specifications , I also believe a machine like this can qualify to be  a  real or a true  4G LTE    Windows  Cellular  Tablet  or  5G Windows Cellular Tablet .

As of today , July 2022 , the computing device that has yet to be invented is the :   [ Laptop/Tablet/Smartphone (ALL-in-ONE) with    built-in DVD-RW Player ]  machine  which can operate like a  Smartphone , regardless whether it has the physical appearance of a  folding Smartphone , regardless whether it has the physical appearance of a  " 360 degrees foldable "  or           " detachable "    laptop , regardless whether it has the physical appearance of a  Tablet , regardless whether it is  INTEL-based  or                          ARM-based , regardless whether it is running Windows Operating System or Linux Operating System or Android Operating System or Google Chrome OS .