Going from a HW50ES to a VW285ES is an absolutely massive improvement. The lumens won't make much of a difference as I don't think the lamps on the HW50ES were that great (If they're the same as my older HW40ES than I'm sure). I also believe the contrast would be a whole lot better too.
Video: Sony VPL-VW760ES, Elite screen Aeon 135" Cinewhite + JVC X7900, Magicscreen Reference ALR 120"
Speakers: Bowers and Wilkins 802 D3 front, JBL 580, JBL 520c, JBL 550p
Amplifiers: Lyngdorf stereo TDAI 2170, Lyngdorf SDA 2400, Denon 4300H Home Theatre
Equipment: PC/PS4/Xbox One/Switch/Synology 2415+