Projector or TV

I am converting a garage into a room I will use for combination purposes.  Mostly it will be a home cinema. But as an ICT  business owner I will use it the odd time as a meeting room where I will be using MS Office, the Internet, etc. I will also use it as a training room as I train people but only once in a while. 15% meetings. 15% training. 70% Home Cinema. I have ordered the new & relatively low cost 4k Projector  Optoma UHD 65 plus a Motorised Screen for approx  $/€ 3,500.  However, I am becoming confused if I should just have ordered a 75" TV.  I can no longer see the benefit of a projector other than that the motorised screen will roll up revealing a Dry Erase board or a smart board,  as wall real estate is scarce that might be handy. I could also get a larger display, but I could live without that.  However a flat screen TV would be more compact,  might provide far more features on its remote control than a projector would,  has a better quality display, no consumables, doesn't need the room to be darkened etc.  Any thoughts would be greatly appreciated.  Robbie.