I've played with enabling the Check Out page for Salesforce1, and including it on the Mobile Navigation menu. It does render under the SLDS styling, but it has some display issues on in iPad.
the Contact lookup dropdown gets partially clipped
selecting a Contact doesn't display the bottom section of the page, until you turn your ipad's orientation, which causes the page to resize to the full extent.
sometimes I couldn't choose another Contact after having chosen one.
I didn't play with any of the other pages to find their issues. The set of most useful mobile pages would be:
Check In
Check Out
New Purchase Wizard
Tickets (and New Ticket Wizard)
Auction Receipts (pdf rendered fine from Check Out page; too bad you can then email it!)
I've played with enabling the Check Out page for Salesforce1, and including it on the Mobile Navigation menu. It does render under the SLDS styling, but it has some display issues on in iPad.
I didn't play with any of the other pages to find their issues. The set of most useful mobile pages would be: