How does the sony vpl-hw10 compares to the benq w1070?
LCoS is arguably the best projection technology out there - but there's no stopping progress, and your unit is old.
Colors are good on the W1070, and its measured contrast will triple your old Sony's. Calibrated brightness is tripled as well, though as BroodishProdigy says, the black level is a step down (which, as he says, can be partly dealt with using an ND filter).
Low lag means gaming is a go. So yeah, it should be an upgrade overall.
I'm not sure what your budget is, but if blacks are really important - and your room is treated (light controlled, dark-colored walls/ceiling/floor), it might also be worth checking out Sony's excellent HW40ES - which proves that LCoS is still right up there with a static contrast ratio that is 10x (!) your current Sony.
BenQ HT2050A Projector; Kodi (on Ubuntu, OpenELEC & S802) via Sony STR-DH540 AVR with Boston Acoustics SoundWare XS SE 5.1 Audio + Jamo 210 Sub. Emby for Mobile Streaming.