1. What have we learned? (very briefly) Sources of the CIB are found up to z~2 Not fully characterised beyond statiscial properties N(>S), n(z), SFR-M* Not understood theoriticalky (SAM, Hydro) CIB at higher redshift still unknown Hints from SMGs Study of CIBA: Very well measured Has not reached its potential « IR-galaxies » exist up to very high-redshift (z~5.7) Cluster formation at z~2-3

2. R&D New devices Very large matrices « IFU »- like R&D New devices Very large matrices « IFU »- like CCAT SPT/ACT ALMA Planck, Herschel WISE SPT/ACT ALMA Planck, Herschel WISE Euclid JWST SPICA Euclid JWST SPICA DES LSST PFS … DES LSST PFS … Galaxy formation Relation to Dark Matter Reionisation Galaxy formation Relation to Dark Matter Reionisation Our future?

3. Some questions Tracers of SF: IR photometry, C+, CO How to use them? How to go beyond the detection? Modeling: SAM, Hydro, AM/HOD Which observations are critical to make progress? Measure the gas fraction at high-redshift? Tools: Redshift: from submm/mm lines M* from dust mass? Strong lensing for CIB mean level determination? Cross-correlation: what we will learn? Combination of weak-lensing/CIB anisotropies? First objects/reionisation: Which progress? kSZ near-IR background fluctuations