I. INTRODUCTION
II. FORECASTING METHODOLOGY
A. Pressure profile model
B. Models for the galaxy and halo distributions
C. Covariance
D. Systematics parameterizations
E. Survey assumptions
F. Projected constraints
III. RESULTS I: HALO-BASED FORECASTS
A. Forecasted signal-to-noise of halo correlations
B. Projected constraints on pressure profiles
C. Constraints on $\tilde{Y}$-M relation
D. Cosmology dependence
IV. RESULTS II: GALAXY-BASED FORECASTS
V. DISCUSSION