Confirming what I use at home: WinVNC on the server - and for the client on the my Android Tablet there are a few choices, but the APP i have is 'androidVNC' https://play.google.com/store/apps/details?id=android.androidVNC&hl=en
To speak to what 'mdavej' said: If you are viewing a webpage on your 50'inch screen in Chrome, the unified remote control gives you easy buttons to crank up the page/font size. However if you are quite far away, and your trying to read some text: For instance? Which file should I click on in a details file list. The picture can be diamond clear, and be and that wonderful 1080p mode, but still you might need super eyes to distinguish one item from another.
--- In my case I don't have that large a room (but I understand your dilemma)