Scalar Boson CMS Run 1 final results, prospectives for Run 2 (and HL-LHC)

Results are presented for the main standard model Higgs boson channels from the CMS experiment at the LHC. Results in the $\tau\tau$ and $WW\rightarrow 2\ell 2\nu$ final states constitute standalone evidences, and results in the $H\rightarrow ZZ\rightarrow 4\ell$ and $\gamma \gamma$ final states constitute standalone observations. Measured signal strengths are broadly consistent with standard model predictions, as are indirect constraints on the width. Spin/parity tested through angular distributions of decay products strongly favours the Standard Model scalar hypothesis compared to tested alternatives. The Higgs boson mass is measured to be $m_H = 125.02 ^{+0.26}_{-0.27}$(stat.)$^{+0.14}_{-0.15}$(syst.)~GeV. Prospects are given for LHC Run 2, as well as projections for HL-LHC.