You are basically future proof your work as the future is mobile, CSS, html5, hidipiNah you're not guilty I'm glad you stuck to your guns Andy. You've probably increased my workload by a factor of 10 but at the end of the day the source files/designs I do are adaptable for hd, high pixel density screens so it just another few lines on my todo list.
edit: and the xf imagery will not be difficult to replicate, infact I already replicated most of it.
I rather do it now and be ahead of the curve and have some competitive advantages.
You know we are waiting with bated breath For your work.