I agree that XeTeX doesn't provide a drop-in replacement for TeX-with-dvips, but neither does pdftex/pdflatex, and many people already use that. Generating postscript or DVI first and converting to PDF produces suboptimal PDFs.
For quite a long time, pstricks didn't work very well with pdflatex, until eventually pstricks added limited support for PDF.
Also, I do consider TikZ sufficiently better than pstricks to switch. The low-level PGF library alone wouldn't provide enough benefit, but the addition of the high-level TikZ makes it extraordinarily good.
For quite a long time, pstricks didn't work very well with pdflatex, until eventually pstricks added limited support for PDF.
Also, I do consider TikZ sufficiently better than pstricks to switch. The low-level PGF library alone wouldn't provide enough benefit, but the addition of the high-level TikZ makes it extraordinarily good.