  We present a mock image catalogue of ~100,000 MUV=-22.5 to -19.6 mag galaxies
at z=7-12 from the BlueTides cosmological simulation. We create mock images of
each galaxy with the James Webb (JWST), Hubble, Roman, and Euclid Space
Telescopes, as well as Subaru, and VISTA, with a range of near- and
mid-infrared filters. We perform photometry on the mock images to estimate the
success of these instruments for detecting high-z galaxies. We predict that
JWST will have unprecedented power in detecting high-z galaxies, with a 95%
completeness limit at least 2.5 magnitudes fainter than VISTA and Subaru, 1.1
magnitudes fainter than Hubble, and 0.9 magnitudes fainter than Roman, for the
same wavelength and exposure time. Focusing on JWST, we consider a range of
exposure times and filters, and find that the NIRCam F356W and F277W filters
will detect the faintest galaxies, with 95% completeness at m=27.4 mag in 10ks
exposures. We also predict the number of high-z galaxies that will be
discovered by upcoming JWST imaging surveys. We predict that the COSMOS-Web
survey will detect ~1000 MUV<-20.1 mag galaxies at 6.5<z<7.5, by virtue of its
large survey area. JADES-Medium will detect almost 100% of MUV<-20 mag galaxies
at z<8.5 due to its significant depth, however with its smaller survey area it
will detect only ~100 of these galaxies at 6.5<z<7.5. Cosmic variance results
in a large range in the number of predicted galaxies each survey will detect,
which is more evident in smaller surveys such as CEERS and the PEARLS NEP and
GOODS-S fields.
