The co-orbiting telescope Xuntian is a neat idea in terms of on-orbit servicing and upgrade opportunities. Obviously as it's in LEO it can't do the intense JWST-esque ultra-deep-field shots, rather it's a wide-field telescope, a bit more like the Nancy Grace Roman née NRO "Stubby Hubble", but with a 2.5 gigapixel survey camera compared to the NGR's 300 MP, and 5 MP for the venerable Hubble. Hubble, NGR and Xuntian have same-ballpark pixel resolution (mostly diffraction-limited by the comparable mirror diameters): 50 milliarcseconds for Hubble, 110 for Xuntian, so you can think of Xuntian as hundreds of Hubbles operating in parallel on neighbouring sections of sky.