There's nothing wrong with braze-ons for water-bottle cages, nor the braze-on for the shifters on the downtube. Some people may use the braze-ons for cages to hold their water bottles, but the braze-on that held the shift levers won't be used and some people on here feel that they take away the clean look of the frame. Most fix-geared riders on here don't use their rear brake so the brake cable stops (along the top tube) sit empty, which also is clutter on the frame. Some fixed-gear people ignore these braze-ons while others have them ground off.

The bike seems like it would be a decent classic geared bike, but you certainly can chose to convert it to fixed-gear. It looks like it has a horizontal drop out, which is preferred because it allows you to move the back wheel forward or backward in order to adjust the tension on the chain (which would otherwise be self-adjusted via a spring tensioner on a multi-geared derailure).

I am converting my old Univega bike; I am keeping the braze-ons for the water-bottle cages but had a local machinist grounded off the braze-on that once held the shift levers and those for the brake cables. This makes the frame cleaner looking and is entirely aesthetic.