Absoloute rubbish.. All browsers can read html.. Not all computers on the internet can use pdf.. either they havent got it installed because they dont want third party software.. or they dont have permission or there computer simply cant handle pdf software.. not all computer systems can... Yet they can all handle html
To say it will render the same on all browsers is totally wrong as not all browsers will show it.. To say it works on all operating systems as you "suggest" is wrong because it doesnt.
It may work on everything you own, have tried or know about... but it certainly isnt fully cross browser, cross OS or backward compatible
HTML is
The above is not my opinion.. it is rock solid facts
Yeeer 1-0 to me boohooo I win